2506 lines
72 KiB
JavaScript
2506 lines
72 KiB
JavaScript
import { apFirst as apFirst_, apS as apS_, apSecond as apSecond_ } from './Apply';
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import { bind as bind_, chainFirst as chainFirst_ } from './Chain';
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import { fromEitherK as fromEitherK_ } from './FromEither';
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import { identity, pipe } from './function';
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import { let as let__, bindTo as bindTo_, flap as flap_ } from './Functor';
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import * as _ from './internal';
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import * as NEA from './NonEmptyArray';
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import * as RA from './ReadonlyArray';
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import { separated } from './Separated';
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import { filterE as filterE_, wiltDefault, witherDefault } from './Witherable';
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import { guard as guard_ } from './Zero';
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// -------------------------------------------------------------------------------------
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// refinements
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// -------------------------------------------------------------------------------------
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/**
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* Test whether an array is empty
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*
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* @example
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* import { isEmpty } from 'fp-ts/Array'
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*
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* assert.strictEqual(isEmpty([]), true)
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* assert.strictEqual(isEmpty(['a']), false)
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*
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* @category refinements
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* @since 2.0.0
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*/
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export var isEmpty = function (as) { return as.length === 0; };
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/**
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* Test whether an array is non empty narrowing down the type to `NonEmptyArray<A>`
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*
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* @example
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* import { isNonEmpty } from 'fp-ts/Array'
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*
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* assert.strictEqual(isNonEmpty([]), false)
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* assert.strictEqual(isNonEmpty(['a']), true)
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*
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* @category refinements
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* @since 2.0.0
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*/
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export var isNonEmpty = NEA.isNonEmpty;
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// -------------------------------------------------------------------------------------
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// constructors
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// -------------------------------------------------------------------------------------
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/**
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* Prepend an element to the front of a `Array`, creating a new `NonEmptyArray`.
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*
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* @example
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* import { prepend } from 'fp-ts/Array'
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* import { pipe } from 'fp-ts/function'
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*
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* assert.deepStrictEqual(pipe([2, 3, 4], prepend(1)), [1, 2, 3, 4])
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*
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* @since 2.10.0
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*/
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export var prepend = NEA.prepend;
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/**
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* Less strict version of [`prepend`](#prepend).
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*
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* @example
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* import { prependW } from 'fp-ts/Array'
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* import { pipe } from 'fp-ts/function'
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*
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* assert.deepStrictEqual(pipe([2, 3, 4], prependW("a")), ["a", 2, 3, 4]);
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*
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* @since 2.11.0
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*/
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export var prependW = NEA.prependW;
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/**
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* Append an element to the end of a `Array`, creating a new `NonEmptyArray`.
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*
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* @example
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* import { append } from 'fp-ts/Array'
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* import { pipe } from 'fp-ts/function'
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*
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* assert.deepStrictEqual(pipe([1, 2, 3], append(4)), [1, 2, 3, 4])
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*
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* @since 2.10.0
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*/
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export var append = NEA.append;
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/**
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* Less strict version of [`append`](#append).
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*
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* @example
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* import { appendW } from 'fp-ts/Array'
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* import { pipe } from 'fp-ts/function'
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*
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* assert.deepStrictEqual(pipe([1, 2, 3], appendW("d")), [1, 2, 3, "d"]);
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*
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* @since 2.11.0
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*/
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export var appendW = NEA.appendW;
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/**
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* Return a `Array` of length `n` with element `i` initialized with `f(i)`.
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*
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* **Note**. `n` is normalized to a non negative integer.
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*
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* @example
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* import { makeBy } from 'fp-ts/Array'
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*
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* const double = (i: number): number => i * 2
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* assert.deepStrictEqual(makeBy(5, double), [0, 2, 4, 6, 8])
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* assert.deepStrictEqual(makeBy(-3, double), [])
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* assert.deepStrictEqual(makeBy(4.32164, double), [0, 2, 4, 6])
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*
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* @category constructors
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* @since 2.0.0
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*/
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export var makeBy = function (n, f) { return (n <= 0 ? [] : NEA.makeBy(f)(n)); };
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/**
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* Create a `Array` containing a value repeated the specified number of times.
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*
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* **Note**. `n` is normalized to a non negative integer.
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*
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* @example
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* import { replicate } from 'fp-ts/Array'
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*
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* assert.deepStrictEqual(replicate(3, 'a'), ['a', 'a', 'a'])
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* assert.deepStrictEqual(replicate(-3, 'a'), [])
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* assert.deepStrictEqual(replicate(2.985647, 'a'), ['a', 'a'])
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*
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* @category constructors
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* @since 2.0.0
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*/
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export var replicate = function (n, a) { return makeBy(n, function () { return a; }); };
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export function fromPredicate(predicate) {
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return function (a) { return (predicate(a) ? [a] : []); };
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}
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// -------------------------------------------------------------------------------------
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// conversions
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// -------------------------------------------------------------------------------------
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/**
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* Create an array from an `Option`. The resulting array will contain the content of the
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* `Option` if it is `Some` and it will be empty if the `Option` is `None`.
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*
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* @example
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* import { fromOption } from 'fp-ts/Array'
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* import { option } from "fp-ts";
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* import { pipe } from 'fp-ts/function'
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*
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* assert.deepStrictEqual(pipe(option.some("a"), fromOption),["a"])
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* assert.deepStrictEqual(pipe(option.none, fromOption),[])
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*
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* @category conversions
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* @since 2.11.0
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*/
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export var fromOption = function (ma) { return (_.isNone(ma) ? [] : [ma.value]); };
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/**
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* Create an array from an `Either`. The resulting array will contain the content of the
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* `Either` if it is `Right` and it will be empty if the `Either` is `Left`.
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*
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* @example
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* import { fromEither } from 'fp-ts/Array'
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* import { either } from "fp-ts";
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* import { pipe } from 'fp-ts/function'
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*
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* assert.deepStrictEqual(pipe(either.right("r"), fromEither), ["r"]);
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* assert.deepStrictEqual(pipe(either.left("l"), fromEither), []);
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*
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* @category conversions
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* @since 2.11.0
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*/
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export var fromEither = function (e) { return (_.isLeft(e) ? [] : [e.right]); };
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/**
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* Less strict version of [`match`](#match).
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*
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* The `W` suffix (short for **W**idening) means that the handler return types will be merged.
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*
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* @example
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* import { matchW } from 'fp-ts/Array'
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* import { pipe } from 'fp-ts/function'
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*
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* const matcherW = matchW(
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* () => "No elements",
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* (as) => as.length
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* );
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* assert.deepStrictEqual(pipe([1, 2, 3, 4], matcherW), 4);
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* assert.deepStrictEqual(pipe([], matcherW), "No elements");
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*
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* @category pattern matching
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* @since 2.11.0
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*/
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export var matchW = function (onEmpty, onNonEmpty) {
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return function (as) {
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return isNonEmpty(as) ? onNonEmpty(as) : onEmpty();
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};
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};
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/**
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* Takes an array, if the array is empty it returns the result of `onEmpty`, otherwise
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* it passes the array to `onNonEmpty` and returns the result.
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*
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* @example
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* import { match } from 'fp-ts/Array'
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* import { pipe } from 'fp-ts/function'
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*
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* const matcher = match(
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* () => "No elements",
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* (as) => `Found ${as.length} element(s)`
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* );
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* assert.deepStrictEqual(pipe([1, 2, 3, 4], matcher), "Found 4 element(s)");
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* assert.deepStrictEqual(pipe([], matcher), "No elements");
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*
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* @category pattern matching
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* @since 2.11.0
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*/
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export var match = matchW;
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/**
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* Less strict version of [`matchLeft`](#matchleft). It will work when `onEmpty` and
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* `onNonEmpty` have different return types.
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*
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* @example
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* import { matchLeftW } from 'fp-ts/Array'
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*
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* const f = matchLeftW(
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* () => 0,
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* (head: string, tail: string[]) => `Found "${head}" followed by ${tail.length} elements`
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* );
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* assert.strictEqual(f(["a", "b", "c"]), 'Found "a" followed by 2 elements');
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* assert.strictEqual(f([]), 0);
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*
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* @category pattern matching
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* @since 2.11.0
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*/
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export var matchLeftW = function (onEmpty, onNonEmpty) {
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return function (as) {
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return isNonEmpty(as) ? onNonEmpty(NEA.head(as), NEA.tail(as)) : onEmpty();
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};
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};
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/**
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* Takes an array, if the array is empty it returns the result of `onEmpty`, otherwise
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* it passes the array to `onNonEmpty` broken into its first element and remaining elements.
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*
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* @example
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* import { matchLeft } from 'fp-ts/Array'
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*
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* const len: <A>(as: Array<A>) => number = matchLeft(() => 0, (_, tail) => 1 + len(tail))
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* assert.strictEqual(len([1, 2, 3]), 3)
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*
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* @category pattern matching
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* @since 2.10.0
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*/
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export var matchLeft = matchLeftW;
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/**
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* Alias of [`matchLeft`](#matchleft).
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*
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* @category pattern matching
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* @since 2.0.0
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*/
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export var foldLeft = matchLeft;
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/**
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* Less strict version of [`matchRight`](#matchright). It will work when `onEmpty` and
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* `onNonEmpty` have different return types.
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*
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* @example
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* import { matchRightW } from 'fp-ts/Array'
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*
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* const f = matchRightW(
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* () => 0,
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* (head: string[], tail: string) => `Found ${head.length} elements folllowed by "${tail}"`
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* );
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* assert.strictEqual(f(["a", "b", "c"]), 'Found 2 elements folllowed by "c"');
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* assert.strictEqual(f([]), 0);
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*
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* @category pattern matching
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* @since 2.11.0
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*/
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export var matchRightW = function (onEmpty, onNonEmpty) {
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return function (as) {
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return isNonEmpty(as) ? onNonEmpty(NEA.init(as), NEA.last(as)) : onEmpty();
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};
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};
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/**
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* Takes an array, if the array is empty it returns the result of `onEmpty`, otherwise
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* it passes the array to `onNonEmpty` broken into its initial elements and the last element.
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*
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* @example
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* import { matchRight } from 'fp-ts/Array'
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*
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* const len: <A>(as: Array<A>) => number = matchRight(
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* () => 0,
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* (head, _) => 1 + len(head)
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* );
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* assert.strictEqual(len([1, 2, 3]), 3);
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*
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* @category pattern matching
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* @since 2.10.0
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*/
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export var matchRight = matchRightW;
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/**
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* Alias of [`matchRight`](#matchright).
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*
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* @category pattern matching
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* @since 2.0.0
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*/
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export var foldRight = matchRight;
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// -------------------------------------------------------------------------------------
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// combinators
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// -------------------------------------------------------------------------------------
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/**
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* Same as [`chain`](#chain), but passing also the index to the iterating function.
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*
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* @example
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* import { chainWithIndex, replicate } from 'fp-ts/Array'
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* import { pipe } from 'fp-ts/function'
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*
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* const f = (index: number, x: string) => replicate(2, `${x}${index}`);
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* assert.deepStrictEqual(pipe(["a", "b", "c"], chainWithIndex(f)), ["a0", "a0", "b1", "b1", "c2", "c2"]);
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*
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* @category sequencing
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* @since 2.7.0
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*/
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export var chainWithIndex = function (f) {
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return function (as) {
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var out = [];
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for (var i = 0; i < as.length; i++) {
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out.push.apply(out, f(i, as[i]));
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}
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return out;
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};
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};
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/**
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* Same as `reduce` but it carries over the intermediate steps
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*
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* @example
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* import { scanLeft } from 'fp-ts/Array'
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*
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* assert.deepStrictEqual(scanLeft(10, (b, a: number) => b - a)([1, 2, 3]), [10, 9, 7, 4])
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*
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* @since 2.0.0
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*/
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export var scanLeft = function (b, f) {
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return function (as) {
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var len = as.length;
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var out = new Array(len + 1);
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out[0] = b;
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for (var i = 0; i < len; i++) {
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out[i + 1] = f(out[i], as[i]);
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}
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return out;
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};
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};
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/**
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* Fold an array from the right, keeping all intermediate results instead of only the final result
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*
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* @example
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* import { scanRight } from 'fp-ts/Array'
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*
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* assert.deepStrictEqual(scanRight(10, (a: number, b) => b - a)([1, 2, 3]), [4, 5, 7, 10])
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*
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* @since 2.0.0
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*/
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export var scanRight = function (b, f) {
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return function (as) {
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var len = as.length;
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var out = new Array(len + 1);
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out[len] = b;
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for (var i = len - 1; i >= 0; i--) {
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out[i] = f(as[i], out[i + 1]);
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}
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return out;
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};
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};
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/**
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* Calculate the number of elements in a `Array`.
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*
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* @example
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* import { size } from 'fp-ts/Array'
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*
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* assert.strictEqual(size(["a","b","c"]),3)
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*
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* @since 2.10.0
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*/
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export var size = function (as) { return as.length; };
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/**
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* Test whether an array contains a particular index
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*
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* @example
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* import { isOutOfBound } from 'fp-ts/Array'
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*
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* assert.strictEqual(isOutOfBound(1,["a","b","c"]),false)
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* assert.strictEqual(isOutOfBound(-1,["a","b","c"]),true)
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* assert.strictEqual(isOutOfBound(3,["a","b","c"]),true)
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*
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* @since 2.0.0
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*/
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export var isOutOfBound = NEA.isOutOfBound;
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// TODO: remove non-curried overloading in v3
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/**
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* This function provides a safe way to read a value at a particular index from an array.
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* It returns a `none` if the index is out of bounds, and a `some` of the element if the
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* index is valid.
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*
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* @example
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* import { lookup } from 'fp-ts/Array'
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* import { some, none } from 'fp-ts/Option'
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* import { pipe } from 'fp-ts/function'
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*
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* assert.deepStrictEqual(pipe([1, 2, 3], lookup(1)), some(2))
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* assert.deepStrictEqual(pipe([1, 2, 3], lookup(3)), none)
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*
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* @since 2.0.0
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*/
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export var lookup = RA.lookup;
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/**
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* Get the first element in an array, or `None` if the array is empty
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*
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* @example
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* import { head } from 'fp-ts/Array'
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* import { some, none } from 'fp-ts/Option'
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*
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* assert.deepStrictEqual(head([1, 2, 3]), some(1))
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* assert.deepStrictEqual(head([]), none)
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*
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* @since 2.0.0
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*/
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export var head = RA.head;
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/**
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* Get the last element in an array, or `None` if the array is empty
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*
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* @example
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* import { last } from 'fp-ts/Array'
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* import { some, none } from 'fp-ts/Option'
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*
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* assert.deepStrictEqual(last([1, 2, 3]), some(3))
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* assert.deepStrictEqual(last([]), none)
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*
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* @since 2.0.0
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*/
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export var last = RA.last;
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/**
|
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* Get all but the first element of an array, creating a new array, or `None` if the array is empty
|
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*
|
|
* @example
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|
* import { tail } from 'fp-ts/Array'
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* import { some, none } from 'fp-ts/Option'
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*
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* assert.deepStrictEqual(tail([1, 2, 3]), some([2, 3]))
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* assert.deepStrictEqual(tail([]), none)
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*
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* @since 2.0.0
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*/
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export var tail = function (as) { return (isNonEmpty(as) ? _.some(NEA.tail(as)) : _.none); };
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/**
|
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* Get all but the last element of an array, creating a new array, or `None` if the array is empty
|
|
*
|
|
* @example
|
|
* import { init } from 'fp-ts/Array'
|
|
* import { some, none } from 'fp-ts/Option'
|
|
*
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* assert.deepStrictEqual(init([1, 2, 3]), some([1, 2]))
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* assert.deepStrictEqual(init([]), none)
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*
|
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* @since 2.0.0
|
|
*/
|
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export var init = function (as) { return (isNonEmpty(as) ? _.some(NEA.init(as)) : _.none); };
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/**
|
|
* Keep only a max number of elements from the start of an `Array`, creating a new `Array`.
|
|
*
|
|
* **Note**. `n` is normalized to a non negative integer.
|
|
*
|
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* @example
|
|
* import { takeLeft } from 'fp-ts/Array'
|
|
*
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* assert.deepStrictEqual(takeLeft(2)([1, 2, 3, 4, 5]), [1, 2]);
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* assert.deepStrictEqual(takeLeft(7)([1, 2, 3, 4, 5]), [1, 2, 3, 4, 5]);
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* assert.deepStrictEqual(takeLeft(0)([1, 2, 3, 4, 5]), []);
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* assert.deepStrictEqual(takeLeft(-1)([1, 2, 3, 4, 5]), [1, 2, 3, 4, 5]);
|
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*
|
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* @since 2.0.0
|
|
*/
|
|
export var takeLeft = function (n) {
|
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return function (as) {
|
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return isOutOfBound(n, as) ? copy(as) : as.slice(0, n);
|
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};
|
|
};
|
|
/**
|
|
* Keep only a max number of elements from the end of an `Array`, creating a new `Array`.
|
|
*
|
|
* **Note**. `n` is normalized to a non negative integer.
|
|
*
|
|
* @example
|
|
* import { takeRight } from 'fp-ts/Array'
|
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*
|
|
* assert.deepStrictEqual(takeRight(2)([1, 2, 3, 4, 5]), [4, 5]);
|
|
* assert.deepStrictEqual(takeRight(7)([1, 2, 3, 4, 5]), [1, 2, 3, 4, 5]);
|
|
* assert.deepStrictEqual(takeRight(0)([1, 2, 3, 4, 5]), []);
|
|
* assert.deepStrictEqual(takeRight(-1)([1, 2, 3, 4, 5]), [1, 2, 3, 4, 5]);
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var takeRight = function (n) {
|
|
return function (as) {
|
|
return isOutOfBound(n, as) ? copy(as) : n === 0 ? [] : as.slice(-n);
|
|
};
|
|
};
|
|
export function takeLeftWhile(predicate) {
|
|
return function (as) {
|
|
var out = [];
|
|
for (var _i = 0, as_1 = as; _i < as_1.length; _i++) {
|
|
var a = as_1[_i];
|
|
if (!predicate(a)) {
|
|
break;
|
|
}
|
|
out.push(a);
|
|
}
|
|
return out;
|
|
};
|
|
}
|
|
var spanLeftIndex = function (as, predicate) {
|
|
var l = as.length;
|
|
var i = 0;
|
|
for (; i < l; i++) {
|
|
if (!predicate(as[i])) {
|
|
break;
|
|
}
|
|
}
|
|
return i;
|
|
};
|
|
export function spanLeft(predicate) {
|
|
return function (as) {
|
|
var _a = splitAt(spanLeftIndex(as, predicate))(as), init = _a[0], rest = _a[1];
|
|
return { init: init, rest: rest };
|
|
};
|
|
}
|
|
/**
|
|
* Creates a new `Array` which is a copy of the input dropping a max number of elements from the start.
|
|
*
|
|
* **Note**. `n` is normalized to a non negative integer.
|
|
*
|
|
* @example
|
|
* import { dropLeft } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(dropLeft(2)([1, 2, 3]), [3]);
|
|
* assert.deepStrictEqual(dropLeft(5)([1, 2, 3]), []);
|
|
* assert.deepStrictEqual(dropLeft(0)([1, 2, 3]), [1, 2, 3]);
|
|
* assert.deepStrictEqual(dropLeft(-2)([1, 2, 3]), [1, 2, 3]);
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var dropLeft = function (n) {
|
|
return function (as) {
|
|
return n <= 0 || isEmpty(as) ? copy(as) : n >= as.length ? [] : as.slice(n, as.length);
|
|
};
|
|
};
|
|
/**
|
|
* Creates a new `Array` which is a copy of the input dropping a max number of elements from the end.
|
|
*
|
|
* **Note**. `n` is normalized to a non negative integer.
|
|
*
|
|
* @example
|
|
* import { dropRight } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(dropRight(2)([1, 2, 3]), [1]);
|
|
* assert.deepStrictEqual(dropRight(5)([1, 2, 3]), []);
|
|
* assert.deepStrictEqual(dropRight(0)([1, 2, 3]), [1, 2, 3]);
|
|
* assert.deepStrictEqual(dropRight(-2)([1, 2, 3]), [1, 2, 3]);
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var dropRight = function (n) {
|
|
return function (as) {
|
|
return n <= 0 || isEmpty(as) ? copy(as) : n >= as.length ? [] : as.slice(0, as.length - n);
|
|
};
|
|
};
|
|
export function dropLeftWhile(predicate) {
|
|
return function (as) { return as.slice(spanLeftIndex(as, predicate)); };
|
|
}
|
|
/**
|
|
* `findIndex` returns an `Option` containing the first index for which a predicate holds.
|
|
* It returns `None` if no element satisfies the predicate.
|
|
* Similar to [`findFirst`](#findFirst) but returning the index instead of the element.
|
|
*
|
|
* @example
|
|
* import { findIndex } from 'fp-ts/Array'
|
|
* import { some, none } from 'fp-ts/Option'
|
|
*
|
|
* assert.deepStrictEqual(findIndex((n: number) => n === 2)([1, 2, 3]), some(1))
|
|
* assert.deepStrictEqual(findIndex((n: number) => n === 2)([]), none)
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var findIndex = RA.findIndex;
|
|
export function findFirst(predicate) {
|
|
return RA.findFirst(predicate);
|
|
}
|
|
/**
|
|
* Given a selector function which takes an element and returns an option,
|
|
* this function applies the selector to each element of the array and
|
|
* returns the first `Some` result. Otherwise it returns `None`.
|
|
*
|
|
* @example
|
|
* import { findFirstMap } from 'fp-ts/Array'
|
|
* import { some, none } from 'fp-ts/Option'
|
|
*
|
|
* interface Person {
|
|
* readonly name: string;
|
|
* readonly age: number;
|
|
* }
|
|
*
|
|
* const persons: Array<Person> = [
|
|
* { name: "John", age: 16 },
|
|
* { name: "Mary", age: 45 },
|
|
* { name: "Joey", age: 28 },
|
|
* ];
|
|
*
|
|
* const nameOfPersonAbove18 = (p: Person) => (p.age <= 18 ? none : some(p.name));
|
|
* const nameOfPersonAbove70 = (p: Person) => (p.age <= 70 ? none : some(p.name));
|
|
* assert.deepStrictEqual(findFirstMap(nameOfPersonAbove18)(persons), some("Mary"));
|
|
* assert.deepStrictEqual(findFirstMap(nameOfPersonAbove70)(persons), none);
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var findFirstMap = RA.findFirstMap;
|
|
export function findLast(predicate) {
|
|
return RA.findLast(predicate);
|
|
}
|
|
/**
|
|
* Given a selector function which takes an element and returns an option,
|
|
* this function applies the selector to each element of the array starting from the
|
|
* end and returns the last `Some` result. Otherwise it returns `None`.
|
|
*
|
|
* @example
|
|
* import { findLastMap } from 'fp-ts/Array'
|
|
* import { some, none } from 'fp-ts/Option'
|
|
*
|
|
* interface Person {
|
|
* readonly name: string;
|
|
* readonly age: number;
|
|
* }
|
|
*
|
|
* const persons: Array<Person> = [
|
|
* { name: "John", age: 16 },
|
|
* { name: "Mary", age: 45 },
|
|
* { name: "Joey", age: 28 },
|
|
* ];
|
|
*
|
|
* const nameOfPersonAbove18 = (p: Person) => (p.age <= 18 ? none : some(p.name));
|
|
* const nameOfPersonAbove70 = (p: Person) => (p.age <= 70 ? none : some(p.name));
|
|
* assert.deepStrictEqual(findLastMap(nameOfPersonAbove18)(persons), some("Joey"));
|
|
* assert.deepStrictEqual(findLastMap(nameOfPersonAbove70)(persons), none);
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var findLastMap = RA.findLastMap;
|
|
/**
|
|
* Returns the index of the last element of the list which matches the predicate.
|
|
* It returns an `Option` containing the index or `None` if not found.
|
|
*
|
|
* @example
|
|
* import { findLastIndex } from 'fp-ts/Array'
|
|
* import { some, none } from 'fp-ts/Option'
|
|
*
|
|
* interface X {
|
|
* readonly a: number
|
|
* readonly b: number
|
|
* }
|
|
* const xs: Array<X> = [{ a: 1, b: 0 }, { a: 1, b: 1 }]
|
|
* assert.deepStrictEqual(findLastIndex((x: { readonly a: number }) => x.a === 1)(xs), some(1))
|
|
* assert.deepStrictEqual(findLastIndex((x: { readonly a: number }) => x.a === 4)(xs), none)
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var findLastIndex = RA.findLastIndex;
|
|
/**
|
|
* This function takes an array and makes a new array containing the same elements.
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var copy = function (as) { return as.slice(); };
|
|
/**
|
|
* Insert an element at the specified index, creating a new array,
|
|
* or returning `None` if the index is out of bounds.
|
|
*
|
|
* @example
|
|
* import { insertAt } from 'fp-ts/Array'
|
|
* import { some } from 'fp-ts/Option'
|
|
*
|
|
* assert.deepStrictEqual(insertAt(2, 5)([1, 2, 3, 4]), some([1, 2, 5, 3, 4]))
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var insertAt = function (i, a) {
|
|
return function (as) {
|
|
return i < 0 || i > as.length ? _.none : _.some(unsafeInsertAt(i, a, as));
|
|
};
|
|
};
|
|
/**
|
|
* Change the element at the specified index, creating a new array,
|
|
* or returning `None` if the index is out of bounds.
|
|
*
|
|
* @example
|
|
* import { updateAt } from 'fp-ts/Array'
|
|
* import { some, none } from 'fp-ts/Option'
|
|
*
|
|
* assert.deepStrictEqual(updateAt(1, 1)([1, 2, 3]), some([1, 1, 3]))
|
|
* assert.deepStrictEqual(updateAt(1, 1)([]), none)
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var updateAt = function (i, a) { return modifyAt(i, function () { return a; }); };
|
|
/**
|
|
* Delete the element at the specified index, creating a new array, or returning `None` if the index is out of bounds.
|
|
*
|
|
* @example
|
|
* import { deleteAt } from 'fp-ts/Array'
|
|
* import { some, none } from 'fp-ts/Option'
|
|
*
|
|
* assert.deepStrictEqual(deleteAt(0)([1, 2, 3]), some([2, 3]))
|
|
* assert.deepStrictEqual(deleteAt(1)([]), none)
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var deleteAt = function (i) {
|
|
return function (as) {
|
|
return isOutOfBound(i, as) ? _.none : _.some(unsafeDeleteAt(i, as));
|
|
};
|
|
};
|
|
/**
|
|
* Apply a function to the element at the specified index, creating a new array, or returning `None` if the index is out
|
|
* of bounds.
|
|
*
|
|
* @example
|
|
* import { modifyAt } from 'fp-ts/Array'
|
|
* import { some, none } from 'fp-ts/Option'
|
|
*
|
|
* const double = (x: number): number => x * 2
|
|
* assert.deepStrictEqual(modifyAt(1, double)([1, 2, 3]), some([1, 4, 3]))
|
|
* assert.deepStrictEqual(modifyAt(1, double)([]), none)
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var modifyAt = function (i, f) {
|
|
return function (as) {
|
|
return isOutOfBound(i, as) ? _.none : _.some(unsafeUpdateAt(i, f(as[i]), as));
|
|
};
|
|
};
|
|
/**
|
|
* Reverse an array, creating a new array
|
|
*
|
|
* @example
|
|
* import { reverse } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(reverse([1, 2, 3]), [3, 2, 1])
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var reverse = function (as) { return (isEmpty(as) ? [] : as.slice().reverse()); };
|
|
/**
|
|
* Takes an `Array` of `Either` and produces a new `Array` containing
|
|
* the values of all the `Right` elements in the same order.
|
|
*
|
|
* @example
|
|
* import { rights } from 'fp-ts/Array'
|
|
* import { right, left } from 'fp-ts/Either'
|
|
*
|
|
* assert.deepStrictEqual(rights([right(1), left('foo'), right(2)]), [1, 2])
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var rights = function (as) {
|
|
var r = [];
|
|
for (var i = 0; i < as.length; i++) {
|
|
var a = as[i];
|
|
if (a._tag === 'Right') {
|
|
r.push(a.right);
|
|
}
|
|
}
|
|
return r;
|
|
};
|
|
/**
|
|
* Takes an `Array` of `Either` and produces a new `Array` containing
|
|
* the values of all the `Left` elements in the same order.
|
|
*
|
|
* @example
|
|
* import { lefts } from 'fp-ts/Array'
|
|
* import { left, right } from 'fp-ts/Either'
|
|
*
|
|
* assert.deepStrictEqual(lefts([right(1), left('foo'), right(2)]), ['foo'])
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var lefts = function (as) {
|
|
var r = [];
|
|
for (var i = 0; i < as.length; i++) {
|
|
var a = as[i];
|
|
if (a._tag === 'Left') {
|
|
r.push(a.left);
|
|
}
|
|
}
|
|
return r;
|
|
};
|
|
/**
|
|
* Sort the elements of an array in increasing order, creating a new array
|
|
*
|
|
* @example
|
|
* import { sort } from 'fp-ts/Array'
|
|
* import * as N from 'fp-ts/number'
|
|
*
|
|
* assert.deepStrictEqual(sort(N.Ord)([3, 2, 1]), [1, 2, 3])
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var sort = function (O) {
|
|
return function (as) {
|
|
return as.length <= 1 ? copy(as) : as.slice().sort(O.compare);
|
|
};
|
|
};
|
|
/**
|
|
* Apply a function to pairs of elements at the same index in two arrays, collecting the results in a new array. If one
|
|
* input array is short, excess elements of the longer array are discarded.
|
|
*
|
|
* @example
|
|
* import { zipWith } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(zipWith([1, 2, 3], ['a', 'b', 'c', 'd'], (n, s) => s + n), ['a1', 'b2', 'c3'])
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var zipWith = function (fa, fb, f) {
|
|
var fc = [];
|
|
var len = Math.min(fa.length, fb.length);
|
|
for (var i = 0; i < len; i++) {
|
|
fc[i] = f(fa[i], fb[i]);
|
|
}
|
|
return fc;
|
|
};
|
|
export function zip(as, bs) {
|
|
if (bs === undefined) {
|
|
return function (bs) { return zip(bs, as); };
|
|
}
|
|
return zipWith(as, bs, function (a, b) { return [a, b]; });
|
|
}
|
|
/**
|
|
* The function is reverse of `zip`. Takes an array of pairs and return two corresponding arrays
|
|
*
|
|
* @example
|
|
* import { unzip } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(unzip([[1, 'a'], [2, 'b'], [3, 'c']]), [[1, 2, 3], ['a', 'b', 'c']])
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var unzip = function (as) {
|
|
var fa = [];
|
|
var fb = [];
|
|
for (var i = 0; i < as.length; i++) {
|
|
fa[i] = as[i][0];
|
|
fb[i] = as[i][1];
|
|
}
|
|
return [fa, fb];
|
|
};
|
|
/**
|
|
* Creates a new `Array`, prepending an element to every member of the input `Array`.
|
|
*
|
|
* @example
|
|
* import { prependAll } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(prependAll(9)([1, 2, 3, 4]), [9, 1, 9, 2, 9, 3, 9, 4])
|
|
*
|
|
* @since 2.10.0
|
|
*/
|
|
export var prependAll = function (middle) {
|
|
var f = NEA.prependAll(middle);
|
|
return function (as) { return (isNonEmpty(as) ? f(as) : []); };
|
|
};
|
|
/**
|
|
* Creates a new `Array` placing an element in between members of the input `Array`.
|
|
*
|
|
* @example
|
|
* import { intersperse } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(intersperse(9)([1, 2, 3, 4]), [1, 9, 2, 9, 3, 9, 4])
|
|
*
|
|
* @since 2.9.0
|
|
*/
|
|
export var intersperse = function (middle) {
|
|
var f = NEA.intersperse(middle);
|
|
return function (as) { return (isNonEmpty(as) ? f(as) : copy(as)); };
|
|
};
|
|
/**
|
|
* Creates a new `Array` rotating the input `Array` by `n` steps.
|
|
*
|
|
* @example
|
|
* import { rotate } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(rotate(2)([1, 2, 3, 4, 5]), [4, 5, 1, 2, 3])
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var rotate = function (n) {
|
|
var f = NEA.rotate(n);
|
|
return function (as) { return (isNonEmpty(as) ? f(as) : copy(as)); };
|
|
};
|
|
// TODO: remove non-curried overloading in v3
|
|
/**
|
|
* Test if a value is a member of an `Array`. Takes a `Eq<A>` as a single
|
|
* argument which returns the function to use to search for a value of type `A` in
|
|
* an `Array<A>`.
|
|
*
|
|
* @example
|
|
* import { elem } from 'fp-ts/Array'
|
|
* import * as N from 'fp-ts/number'
|
|
* import { pipe } from 'fp-ts/function'
|
|
*
|
|
* assert.strictEqual(pipe([1, 2, 3], elem(N.Eq)(2)), true)
|
|
* assert.strictEqual(pipe([1, 2, 3], elem(N.Eq)(0)), false)
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var elem = RA.elem;
|
|
/**
|
|
* Creates a new `Array` removing duplicate elements, keeping the first occurrence of an element,
|
|
* based on a `Eq<A>`.
|
|
*
|
|
* @example
|
|
* import { uniq } from 'fp-ts/Array'
|
|
* import * as N from 'fp-ts/number'
|
|
*
|
|
* assert.deepStrictEqual(uniq(N.Eq)([1, 2, 1]), [1, 2])
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var uniq = function (E) {
|
|
var f = NEA.uniq(E);
|
|
return function (as) { return (isNonEmpty(as) ? f(as) : copy(as)); };
|
|
};
|
|
/**
|
|
* Sort the elements of an array in increasing order, where elements are compared using first `ords[0]`, then `ords[1]`,
|
|
* etc...
|
|
*
|
|
* @example
|
|
* import { sortBy } from 'fp-ts/Array'
|
|
* import { contramap } from 'fp-ts/Ord'
|
|
* import * as S from 'fp-ts/string'
|
|
* import * as N from 'fp-ts/number'
|
|
* import { pipe } from 'fp-ts/function'
|
|
*
|
|
* interface Person {
|
|
* readonly name: string
|
|
* readonly age: number
|
|
* }
|
|
* const byName = pipe(S.Ord, contramap((p: Person) => p.name))
|
|
* const byAge = pipe(N.Ord, contramap((p: Person) => p.age))
|
|
*
|
|
* const sortByNameByAge = sortBy([byName, byAge])
|
|
*
|
|
* const persons = [{ name: 'a', age: 1 }, { name: 'b', age: 3 }, { name: 'c', age: 2 }, { name: 'b', age: 2 }]
|
|
* assert.deepStrictEqual(sortByNameByAge(persons), [
|
|
* { name: 'a', age: 1 },
|
|
* { name: 'b', age: 2 },
|
|
* { name: 'b', age: 3 },
|
|
* { name: 'c', age: 2 }
|
|
* ])
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var sortBy = function (ords) {
|
|
var f = NEA.sortBy(ords);
|
|
return function (as) { return (isNonEmpty(as) ? f(as) : copy(as)); };
|
|
};
|
|
/**
|
|
* A useful recursion pattern for processing an array to produce a new array, often used for "chopping" up the input
|
|
* array. Typically chop is called with some function that will consume an initial prefix of the array and produce a
|
|
* value and the rest of the array.
|
|
*
|
|
* @example
|
|
* import { Eq } from 'fp-ts/Eq'
|
|
* import * as A from 'fp-ts/Array'
|
|
* import * as N from 'fp-ts/number'
|
|
* import { pipe } from 'fp-ts/function'
|
|
*
|
|
* const group = <A>(S: Eq<A>): ((as: Array<A>) => Array<Array<A>>) => {
|
|
* return A.chop(as => {
|
|
* const { init, rest } = pipe(as, A.spanLeft((a: A) => S.equals(a, as[0])))
|
|
* return [init, rest]
|
|
* })
|
|
* }
|
|
* assert.deepStrictEqual(group(N.Eq)([1, 1, 2, 3, 3, 4]), [[1, 1], [2], [3, 3], [4]])
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var chop = function (f) {
|
|
var g = NEA.chop(f);
|
|
return function (as) { return (isNonEmpty(as) ? g(as) : []); };
|
|
};
|
|
/**
|
|
* Splits an `Array` into two pieces, the first piece has max `n` elements.
|
|
*
|
|
* @example
|
|
* import { splitAt } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(splitAt(2)([1, 2, 3, 4, 5]), [[1, 2], [3, 4, 5]])
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var splitAt = function (n) {
|
|
return function (as) {
|
|
return n >= 1 && isNonEmpty(as) ? NEA.splitAt(n)(as) : isEmpty(as) ? [copy(as), []] : [[], copy(as)];
|
|
};
|
|
};
|
|
/**
|
|
* Splits an array into length-`n` pieces. The last piece will be shorter if `n` does not evenly divide the length of
|
|
* the array. Note that `chunksOf(n)([])` is `[]`, not `[[]]`. This is intentional, and is consistent with a recursive
|
|
* definition of `chunksOf`; it satisfies the property that
|
|
*
|
|
* ```ts
|
|
* chunksOf(n)(xs).concat(chunksOf(n)(ys)) == chunksOf(n)(xs.concat(ys)))
|
|
* ```
|
|
*
|
|
* whenever `n` evenly divides the length of `xs`.
|
|
*
|
|
* @example
|
|
* import { chunksOf } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(chunksOf(2)([1, 2, 3, 4, 5]), [[1, 2], [3, 4], [5]])
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var chunksOf = function (n) {
|
|
var f = NEA.chunksOf(n);
|
|
return function (as) { return (isNonEmpty(as) ? f(as) : []); };
|
|
};
|
|
/**
|
|
* @category lifting
|
|
* @since 2.11.0
|
|
*/
|
|
export var fromOptionK = function (f) {
|
|
return function () {
|
|
var a = [];
|
|
for (var _i = 0; _i < arguments.length; _i++) {
|
|
a[_i] = arguments[_i];
|
|
}
|
|
return fromOption(f.apply(void 0, a));
|
|
};
|
|
};
|
|
export function comprehension(input, f, g) {
|
|
if (g === void 0) { g = function () { return true; }; }
|
|
var go = function (scope, input) {
|
|
return isNonEmpty(input)
|
|
? pipe(NEA.head(input), chain(function (x) { return go(pipe(scope, append(x)), NEA.tail(input)); }))
|
|
: g.apply(void 0, scope) ? [f.apply(void 0, scope)]
|
|
: [];
|
|
};
|
|
return go([], input);
|
|
}
|
|
/**
|
|
* @since 2.11.0
|
|
*/
|
|
export var concatW = function (second) {
|
|
return function (first) {
|
|
return isEmpty(first) ? copy(second) : isEmpty(second) ? copy(first) : first.concat(second);
|
|
};
|
|
};
|
|
/**
|
|
* @since 2.11.0
|
|
*/
|
|
export var concat = concatW;
|
|
export function union(E) {
|
|
var unionE = NEA.union(E);
|
|
return function (first, second) {
|
|
if (second === undefined) {
|
|
var unionE_1 = union(E);
|
|
return function (second) { return unionE_1(second, first); };
|
|
}
|
|
return isNonEmpty(first) && isNonEmpty(second)
|
|
? unionE(second)(first)
|
|
: isNonEmpty(first)
|
|
? copy(first)
|
|
: copy(second);
|
|
};
|
|
}
|
|
export function intersection(E) {
|
|
var elemE = elem(E);
|
|
return function (xs, ys) {
|
|
if (ys === undefined) {
|
|
var intersectionE_1 = intersection(E);
|
|
return function (ys) { return intersectionE_1(ys, xs); };
|
|
}
|
|
return xs.filter(function (a) { return elemE(a, ys); });
|
|
};
|
|
}
|
|
export function difference(E) {
|
|
var elemE = elem(E);
|
|
return function (xs, ys) {
|
|
if (ys === undefined) {
|
|
var differenceE_1 = difference(E);
|
|
return function (ys) { return differenceE_1(ys, xs); };
|
|
}
|
|
return xs.filter(function (a) { return !elemE(a, ys); });
|
|
};
|
|
}
|
|
var _map = function (fa, f) { return pipe(fa, map(f)); };
|
|
/* istanbul ignore next */
|
|
var _mapWithIndex = function (fa, f) { return pipe(fa, mapWithIndex(f)); };
|
|
var _ap = function (fab, fa) { return pipe(fab, ap(fa)); };
|
|
var _chain = function (ma, f) { return pipe(ma, chain(f)); };
|
|
/* istanbul ignore next */
|
|
var _filter = function (fa, predicate) { return pipe(fa, filter(predicate)); };
|
|
/* istanbul ignore next */
|
|
var _filterMap = function (fa, f) { return pipe(fa, filterMap(f)); };
|
|
/* istanbul ignore next */
|
|
var _partition = function (fa, predicate) {
|
|
return pipe(fa, partition(predicate));
|
|
};
|
|
/* istanbul ignore next */
|
|
var _partitionMap = function (fa, f) { return pipe(fa, partitionMap(f)); };
|
|
/* istanbul ignore next */
|
|
var _partitionWithIndex = function (fa, predicateWithIndex) { return pipe(fa, partitionWithIndex(predicateWithIndex)); };
|
|
/* istanbul ignore next */
|
|
var _partitionMapWithIndex = function (fa, f) { return pipe(fa, partitionMapWithIndex(f)); };
|
|
/* istanbul ignore next */
|
|
var _alt = function (fa, that) { return pipe(fa, alt(that)); };
|
|
var _reduce = function (fa, b, f) { return pipe(fa, reduce(b, f)); };
|
|
/* istanbul ignore next */
|
|
var _foldMap = function (M) {
|
|
var foldMapM = foldMap(M);
|
|
return function (fa, f) { return pipe(fa, foldMapM(f)); };
|
|
};
|
|
/* istanbul ignore next */
|
|
var _reduceRight = function (fa, b, f) { return pipe(fa, reduceRight(b, f)); };
|
|
/* istanbul ignore next */
|
|
var _reduceWithIndex = function (fa, b, f) {
|
|
return pipe(fa, reduceWithIndex(b, f));
|
|
};
|
|
/* istanbul ignore next */
|
|
var _foldMapWithIndex = function (M) {
|
|
var foldMapWithIndexM = foldMapWithIndex(M);
|
|
return function (fa, f) { return pipe(fa, foldMapWithIndexM(f)); };
|
|
};
|
|
/* istanbul ignore next */
|
|
var _reduceRightWithIndex = function (fa, b, f) {
|
|
return pipe(fa, reduceRightWithIndex(b, f));
|
|
};
|
|
/* istanbul ignore next */
|
|
var _filterMapWithIndex = function (fa, f) { return pipe(fa, filterMapWithIndex(f)); };
|
|
/* istanbul ignore next */
|
|
var _filterWithIndex = function (fa, predicateWithIndex) { return pipe(fa, filterWithIndex(predicateWithIndex)); };
|
|
/* istanbul ignore next */
|
|
var _extend = function (fa, f) { return pipe(fa, extend(f)); };
|
|
/* istanbul ignore next */
|
|
var _traverse = function (F) {
|
|
var traverseF = traverse(F);
|
|
return function (ta, f) { return pipe(ta, traverseF(f)); };
|
|
};
|
|
/* istanbul ignore next */
|
|
var _traverseWithIndex = function (F) {
|
|
var traverseWithIndexF = traverseWithIndex(F);
|
|
return function (ta, f) { return pipe(ta, traverseWithIndexF(f)); };
|
|
};
|
|
var _chainRecDepthFirst = RA._chainRecDepthFirst;
|
|
var _chainRecBreadthFirst = RA._chainRecBreadthFirst;
|
|
/**
|
|
* Given an element of the base type, `of` builds an `Array` containing just that
|
|
* element of the base type (this is useful for building a `Monad`).
|
|
*
|
|
* @example
|
|
* import { of } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(of("a"), ["a"]);
|
|
*
|
|
* @category constructors
|
|
* @since 2.0.0
|
|
*/
|
|
export var of = NEA.of;
|
|
/**
|
|
* Makes an empty `Array`, useful for building a [`Monoid`](#Monoid)
|
|
*
|
|
* @since 2.7.0
|
|
*/
|
|
export var zero = function () { return []; };
|
|
/**
|
|
* `map` can be used to turn functions `(a: A) => B` into functions `(fa: Array<A>) => Array<B>`.
|
|
* In practice it applies the base function to each element of the array and collects the
|
|
* results in a new array.
|
|
*
|
|
* @example
|
|
* import { map } from 'fp-ts/Array'
|
|
* import { pipe } from 'fp-ts/function'
|
|
*
|
|
* const f = (n: number) => n * 2;
|
|
* assert.deepStrictEqual(pipe([1, 2, 3], map(f)), [2, 4, 6]);
|
|
*
|
|
* @category mapping
|
|
* @since 2.0.0
|
|
*/
|
|
export var map = function (f) { return function (fa) { return fa.map(function (a) { return f(a); }); }; };
|
|
/**
|
|
* @example
|
|
* import { ap, map, of } from 'fp-ts/Array'
|
|
* import { pipe } from 'fp-ts/function'
|
|
*
|
|
* // a curried function with 3 input parameteres
|
|
* const f = (s1: string) => (n: number) => (s2: string) => s1 + n + s2;
|
|
*
|
|
* // let's use `ap` to iterate `f` over an array for each input parameter
|
|
* assert.deepStrictEqual(pipe(["a", "b"], map(f), ap([1, 2]), ap(["😀", "😫", "😎"])), [
|
|
* "a1😀", "a1😫", "a1😎",
|
|
* "a2😀", "a2😫", "a2😎",
|
|
* "b1😀", "b1😫", "b1😎",
|
|
* "b2😀", "b2😫", "b2😎",
|
|
* ]);
|
|
*
|
|
* // given Array implements the Applicative interface with the `of` method,
|
|
* // we can write exactly the same thing in a more symmetric way
|
|
* // using `of` on `f` and `ap` on each array in input
|
|
* assert.deepStrictEqual(
|
|
* pipe(of(f), ap(["a", "b"]), ap([1, 2]), ap(["😀", "😫", "😎"])),
|
|
* pipe(["a", "b"], map(f), ap([1, 2]), ap(["😀", "😫", "😎"]))
|
|
* );
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var ap = function (fa) { return chain(function (f) { return pipe(fa, map(f)); }); };
|
|
/**
|
|
* Composes computations in sequence, using the return value of one computation to
|
|
* determine the next computation.
|
|
*
|
|
* In other words it takes a function `f` that produces an array from a single element of
|
|
* the base type `A` and returns a new function which applies `f` to each element of the
|
|
* input array (like [`map`](#map)) and, instead of returning an array of arrays, concatenates the
|
|
* results into a single array (like [`flatten`](#flatten)).
|
|
*
|
|
* This is the `chain` component of the array `Monad`.
|
|
*
|
|
* @example
|
|
* import { chain, map, replicate } from 'fp-ts/Array'
|
|
* import { pipe } from 'fp-ts/function'
|
|
*
|
|
* const f = (n: number) => replicate(n, `${n}`);
|
|
* assert.deepStrictEqual(pipe([1, 2, 3], map(f)), [["1"], ["2", "2"], ["3", "3", "3"]]);
|
|
* assert.deepStrictEqual(pipe([1, 2, 3], chain(f)), ["1", "2", "2", "3", "3", "3"]);
|
|
*
|
|
* @category sequencing
|
|
* @since 2.0.0
|
|
*/
|
|
export var chain = function (f) { return function (ma) {
|
|
return pipe(ma, chainWithIndex(function (_, a) { return f(a); }));
|
|
}; };
|
|
/**
|
|
* Takes an array of arrays of `A` and flattens them into an array of `A`
|
|
* by concatenating the elements of each array in order.
|
|
*
|
|
* @example
|
|
* import { flatten } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(flatten([["a"], ["b", "c"], ["d", "e", "f"]]), ["a", "b", "c", "d", "e", "f"]);
|
|
*
|
|
* @category sequencing
|
|
* @since 2.5.0
|
|
*/
|
|
export var flatten = /*#__PURE__*/ chain(identity);
|
|
/**
|
|
* Same as [`map`](#map), but the iterating function takes both the index and the value
|
|
* of the element.
|
|
*
|
|
* @example
|
|
* import { mapWithIndex } from 'fp-ts/Array'
|
|
* import { pipe } from 'fp-ts/function'
|
|
*
|
|
* const f = (i: number, s: string) => `${s} - ${i}`;
|
|
* assert.deepStrictEqual(pipe(["a", "b", "c"], mapWithIndex(f)), ["a - 0", "b - 1", "c - 2"]);
|
|
*
|
|
* @category mapping
|
|
* @since 2.0.0
|
|
*/
|
|
export var mapWithIndex = function (f) { return function (fa) {
|
|
return fa.map(function (a, i) { return f(i, a); });
|
|
}; };
|
|
/**
|
|
* Maps an array with an iterating function that takes the index and the value of
|
|
* each element and returns an `Option`. It keeps only the `Some` values discarding
|
|
* the `None`s.
|
|
*
|
|
* Same as [`filterMap`](#filterMap), but with an iterating function which takes also
|
|
* the index as input.
|
|
*
|
|
* @example
|
|
* import { filterMapWithIndex } from 'fp-ts/Array'
|
|
* import { pipe } from 'fp-ts/function'
|
|
* import { option } from "fp-ts";
|
|
*
|
|
* const f = (i: number, s: string) => (i % 2 === 1 ? option.some(s.toUpperCase()) : option.none);
|
|
* assert.deepStrictEqual(pipe(["a", "no", "neither", "b"], filterMapWithIndex(f)), ["NO", "B"]);
|
|
*
|
|
* @category filtering
|
|
* @since 2.0.0
|
|
*/
|
|
export var filterMapWithIndex = function (f) {
|
|
return function (fa) {
|
|
var out = [];
|
|
for (var i = 0; i < fa.length; i++) {
|
|
var optionB = f(i, fa[i]);
|
|
if (_.isSome(optionB)) {
|
|
out.push(optionB.value);
|
|
}
|
|
}
|
|
return out;
|
|
};
|
|
};
|
|
/**
|
|
* Maps an array with an iterating function that returns an `Option`
|
|
* and it keeps only the `Some` values discarding the `None`s.
|
|
*
|
|
* @example
|
|
* import { filterMap } from 'fp-ts/Array'
|
|
* import { pipe } from 'fp-ts/function'
|
|
* import { option } from "fp-ts";
|
|
*
|
|
* const f = (s: string) => s.length === 1 ? option.some(s.toUpperCase()) : option.none;
|
|
* assert.deepStrictEqual(pipe(["a", "no", "neither", "b"], filterMap(f)), ["A", "B"]);
|
|
*
|
|
* @category filtering
|
|
* @since 2.0.0
|
|
*/
|
|
export var filterMap = function (f) {
|
|
return filterMapWithIndex(function (_, a) { return f(a); });
|
|
};
|
|
/**
|
|
* Compact an array of `Option`s discarding the `None` values and
|
|
* keeping the `Some` values. It returns a new array containing the values of
|
|
* the `Some` options.
|
|
*
|
|
* @example
|
|
* import { compact } from 'fp-ts/Array'
|
|
* import { option } from "fp-ts";
|
|
*
|
|
* assert.deepStrictEqual(compact([option.some("a"), option.none, option.some("b")]), ["a", "b"]);
|
|
*
|
|
* @category filtering
|
|
* @since 2.0.0
|
|
*/
|
|
export var compact = /*#__PURE__*/ filterMap(identity);
|
|
/**
|
|
* Separate an array of `Either`s into `Left`s and `Right`s, creating two new arrays:
|
|
* one containing all the left values and one containing all the right values.
|
|
*
|
|
* @example
|
|
* import { separate } from 'fp-ts/Array'
|
|
* import { either } from "fp-ts";
|
|
*
|
|
* assert.deepStrictEqual(separate([either.right("r1"), either.left("l1"), either.right("r2")]), {
|
|
* left: ["l1"],
|
|
* right: ["r1", "r2"],
|
|
* });
|
|
*
|
|
* @category filtering
|
|
* @since 2.0.0
|
|
*/
|
|
export var separate = function (fa) {
|
|
var left = [];
|
|
var right = [];
|
|
for (var _i = 0, fa_1 = fa; _i < fa_1.length; _i++) {
|
|
var e = fa_1[_i];
|
|
if (e._tag === 'Left') {
|
|
left.push(e.left);
|
|
}
|
|
else {
|
|
right.push(e.right);
|
|
}
|
|
}
|
|
return separated(left, right);
|
|
};
|
|
/**
|
|
* Given an iterating function that is a `Predicate` or a `Refinement`,
|
|
* `filter` creates a new `Array` containing the elements of the original
|
|
* `Array` for which the iterating function is `true`.
|
|
*
|
|
* @example
|
|
* import { filter } from 'fp-ts/Array'
|
|
* import { isString } from "fp-ts/lib/string";
|
|
*
|
|
* assert.deepStrictEqual(filter(isString)(["a", 1, {}, "b", 5]), ["a", "b"]);
|
|
* assert.deepStrictEqual(filter((x:number) => x > 0)([-3, 1, -2, 5]), [1, 5]);
|
|
*
|
|
* @category filtering
|
|
* @since 2.0.0
|
|
*/
|
|
export var filter = function (predicate) {
|
|
return function (as) {
|
|
return as.filter(predicate);
|
|
};
|
|
};
|
|
/**
|
|
* Given an iterating function that is a `Predicate` or a `Refinement`,
|
|
* `partition` creates two new `Array`s: `right` containing the elements of the original
|
|
* `Array` for which the iterating function is `true`, `left` containing the elements
|
|
* for which it is false.
|
|
*
|
|
* @example
|
|
* import { partition } from 'fp-ts/Array'
|
|
* import { isString } from "fp-ts/lib/string";
|
|
*
|
|
* assert.deepStrictEqual(partition(isString)(["a", 1, {}, "b", 5]), { left: [1, {}, 5], right: ["a", "b"] });
|
|
* assert.deepStrictEqual(partition((x: number) => x > 0)([-3, 1, -2, 5]), { left: [-3, -2], right: [1, 5] });
|
|
*
|
|
* @category filtering
|
|
* @since 2.0.0
|
|
*/
|
|
export var partition = function (predicate) {
|
|
return partitionWithIndex(function (_, a) { return predicate(a); });
|
|
};
|
|
/**
|
|
* Same as [`partition`](#partition), but passing also the index to the iterating function.
|
|
*
|
|
* @example
|
|
* import { partitionWithIndex } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(partitionWithIndex((index, x: number) => index < 3 && x > 0)([-2, 5, 6, 7]), {
|
|
* left: [-2, 7],
|
|
* right: [5, 6],
|
|
* });
|
|
*
|
|
* @category filtering
|
|
* @since 2.0.0
|
|
*/
|
|
export var partitionWithIndex = function (predicateWithIndex) {
|
|
return function (as) {
|
|
var left = [];
|
|
var right = [];
|
|
for (var i = 0; i < as.length; i++) {
|
|
var b = as[i];
|
|
if (predicateWithIndex(i, b)) {
|
|
right.push(b);
|
|
}
|
|
else {
|
|
left.push(b);
|
|
}
|
|
}
|
|
return separated(left, right);
|
|
};
|
|
};
|
|
/**
|
|
* Given an iterating function that returns an `Either`,
|
|
* `partitionMap` applies the iterating function to each element and it creates two `Array`s:
|
|
* `right` containing the values of `Right` results, `left` containing the values of `Left` results.
|
|
*
|
|
* @example
|
|
* import { partitionMap } from 'fp-ts/Array'
|
|
* import { Either, left, right } from "fp-ts/lib/Either";
|
|
*
|
|
* const upperIfString = <B>(x: B): Either<B, string> =>
|
|
* typeof x === "string" ? right(x.toUpperCase()) : left(x);
|
|
* assert.deepStrictEqual(partitionMap(upperIfString)([-2, "hello", 6, 7, "world"]), {
|
|
* left: [-2, 6, 7],
|
|
* right: [ 'HELLO', 'WORLD' ],
|
|
* });
|
|
*
|
|
* @category filtering
|
|
* @since 2.0.0
|
|
*/
|
|
export var partitionMap = function (f) { return partitionMapWithIndex(function (_, a) { return f(a); }); };
|
|
/**
|
|
* Same as [`partitionMap`](#partitionMap), but passing also the index to the iterating function.
|
|
*
|
|
* @example
|
|
* import { partitionMapWithIndex } from 'fp-ts/Array'
|
|
* import { Either, left, right } from "fp-ts/lib/Either";
|
|
*
|
|
* const upperIfStringBefore3 = <B>(index: number, x: B): Either<B, string> =>
|
|
* index < 3 && typeof x === "string" ? right(x.toUpperCase()) : left(x);
|
|
* assert.deepStrictEqual(partitionMapWithIndex(upperIfStringBefore3)([-2, "hello", 6, 7, "world"]), {
|
|
* left: [-2, 6, 7, "world"],
|
|
* right: ["HELLO"],
|
|
* });
|
|
*
|
|
* @category filtering
|
|
* @since 2.0.0
|
|
*/
|
|
export var partitionMapWithIndex = function (f) {
|
|
return function (fa) {
|
|
var left = [];
|
|
var right = [];
|
|
for (var i = 0; i < fa.length; i++) {
|
|
var e = f(i, fa[i]);
|
|
if (e._tag === 'Left') {
|
|
left.push(e.left);
|
|
}
|
|
else {
|
|
right.push(e.right);
|
|
}
|
|
}
|
|
return separated(left, right);
|
|
};
|
|
};
|
|
/**
|
|
* Less strict version of [`alt`](#alt).
|
|
*
|
|
* The `W` suffix (short for **W**idening) means that the return types will be merged.
|
|
*
|
|
* @example
|
|
* import * as A from 'fp-ts/Array'
|
|
* import { pipe } from 'fp-ts/function'
|
|
*
|
|
* assert.deepStrictEqual(
|
|
* pipe(
|
|
* [1, 2, 3],
|
|
* A.altW(() => ['a', 'b'])
|
|
* ),
|
|
* [1, 2, 3, 'a', 'b']
|
|
* )
|
|
*
|
|
* @category error handling
|
|
* @since 2.9.0
|
|
*/
|
|
export var altW = function (that) {
|
|
return function (fa) {
|
|
return fa.concat(that());
|
|
};
|
|
};
|
|
/**
|
|
* Identifies an associative operation on a type constructor. It is similar to `Semigroup`, except that it applies to
|
|
* types of kind `* -> *`.
|
|
*
|
|
* In case of `Array` concatenates the inputs into a single array.
|
|
*
|
|
* @example
|
|
* import * as A from 'fp-ts/Array'
|
|
* import { pipe } from 'fp-ts/function'
|
|
*
|
|
* assert.deepStrictEqual(
|
|
* pipe(
|
|
* [1, 2, 3],
|
|
* A.alt(() => [4, 5])
|
|
* ),
|
|
* [1, 2, 3, 4, 5]
|
|
* )
|
|
*
|
|
* @category error handling
|
|
* @since 2.0.0
|
|
*/
|
|
export var alt = altW;
|
|
/**
|
|
* Same as [`filter`](#filter), but passing also the index to the iterating function.
|
|
*
|
|
* @example
|
|
* import { filterWithIndex } from 'fp-ts/Array';
|
|
*
|
|
* const f = (index: number, x: number) => x > 0 && index <= 2;
|
|
* assert.deepStrictEqual(filterWithIndex(f)([-3, 1, -2, 5]), [1]);
|
|
*
|
|
* @category filtering
|
|
* @since 2.0.0
|
|
*/
|
|
export var filterWithIndex = function (predicateWithIndex) {
|
|
return function (as) {
|
|
return as.filter(function (b, i) { return predicateWithIndex(i, b); });
|
|
};
|
|
};
|
|
/**
|
|
* Given an iterating function that takes `Array<A>` as input, `extend` returns
|
|
* an array containing the results of the iterating function applied to the whole input
|
|
* `Array`, then to the input `Array` without the first element, then to the input
|
|
* `Array` without the first two elements, etc.
|
|
*
|
|
* @example
|
|
* import { extend } from 'fp-ts/Array'
|
|
*
|
|
* const f = (a: string[]) => a.join(",");
|
|
* assert.deepStrictEqual(extend(f)(["a", "b", "c"]), ["a,b,c", "b,c", "c"]);
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var extend = function (f) { return function (wa) {
|
|
return wa.map(function (_, i) { return f(wa.slice(i)); });
|
|
}; };
|
|
/**
|
|
* `duplicate` returns an array containing the whole input `Array`,
|
|
* then to the input `Array` dropping the first element, then to the input
|
|
* `Array` dropping the first two elements, etc.
|
|
*
|
|
* @example
|
|
* import { duplicate } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(duplicate(["a", "b", "c"]), [["a", "b", "c"], ["b", "c"], ["c"]]);
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
export var duplicate = /*#__PURE__*/ extend(identity);
|
|
/**
|
|
* Map and fold an `Array`.
|
|
* Map the `Array` passing each value to the iterating function.
|
|
* Then fold the results using the provided `Monoid`.
|
|
*
|
|
* @example
|
|
* import { foldMap } from 'fp-ts/Array'
|
|
*
|
|
* const monoid = { concat: (a: string, b: string) => a + b, empty: "" };
|
|
* const f = (s: string) => s.toUpperCase()
|
|
* assert.deepStrictEqual(foldMap(monoid)(f)(["a", "b", "c"]), "ABC");
|
|
*
|
|
* @category folding
|
|
* @since 2.0.0
|
|
*/
|
|
export var foldMap = RA.foldMap;
|
|
/**
|
|
* Same as [`foldMap`](#foldMap) but passing also the index to the iterating function.
|
|
*
|
|
* @example
|
|
* import { foldMapWithIndex } from 'fp-ts/Array'
|
|
*
|
|
* const monoid = { concat: (a: string, b: string) => a + b, empty: "" };
|
|
* const f = (index:number, s: string) => `${s.toUpperCase()}(${index})`
|
|
* assert.deepStrictEqual(foldMapWithIndex(monoid)(f)(["a", "b", "c"]), "A(0)B(1)C(2)");
|
|
*
|
|
* @category folding
|
|
* @since 2.0.0
|
|
*/
|
|
export var foldMapWithIndex = RA.foldMapWithIndex;
|
|
/**
|
|
* Reduces an `Array`.
|
|
*
|
|
* `reduce` executes the supplied iterating function on each element of the array,
|
|
* in order, passing in the element and the return value from the calculation on the preceding element.
|
|
*
|
|
* The first time that the iterating function is called there is no "return value of the
|
|
* previous calculation", the initial value is used in its place.
|
|
*
|
|
* @example
|
|
* import { reduce } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(reduce(5, (acc: number, cur: number) => acc * cur)([2, 3]), 5 * 2 * 3);
|
|
*
|
|
* @category folding
|
|
* @since 2.0.0
|
|
*/
|
|
export var reduce = RA.reduce;
|
|
/**
|
|
* Same as [`reduce`](#reduce) but passing also the index to the iterating function.
|
|
*
|
|
* @example
|
|
* import { reduceWithIndex } from 'fp-ts/Array'
|
|
*
|
|
* const f = (index: number, acc: string, cur: unknown) =>
|
|
* acc + (typeof cur === "string" ? cur.toUpperCase() + index : "");
|
|
* assert.deepStrictEqual(reduceWithIndex("", f)([2, "a", "b", null]), "A1B2");
|
|
*
|
|
* @category folding
|
|
* @since 2.0.0
|
|
*/
|
|
export var reduceWithIndex = RA.reduceWithIndex;
|
|
/**
|
|
* Same as [`reduce`](#reduce) but applied from the end to the start.
|
|
*
|
|
* *Note*: the iterating function in this case takes the accumulator as the last argument.
|
|
*
|
|
* @example
|
|
* import { reduceRight } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(reduceRight("", (cur: string, acc: string) => acc + cur)(["a", "b", "c"]), "cba");
|
|
*
|
|
* @category folding
|
|
* @since 2.0.0
|
|
*/
|
|
export var reduceRight = RA.reduceRight;
|
|
/**
|
|
* Same as [`reduceRight`](#reduceRight) but passing also the index to the iterating function.
|
|
*
|
|
* @example
|
|
* import { reduceRightWithIndex } from 'fp-ts/Array'
|
|
*
|
|
* const f = (index: number, cur: unknown, acc: string) =>
|
|
* acc + (typeof cur === "string" ? cur.toUpperCase() + index : "");
|
|
* assert.deepStrictEqual(reduceRightWithIndex("", f)([2, "a", "b", null]), "B2A1");
|
|
*
|
|
* @category folding
|
|
* @since 2.0.0
|
|
*/
|
|
export var reduceRightWithIndex = RA.reduceRightWithIndex;
|
|
/**
|
|
* Given an iterating function that returns a `HKT` (higher kinded type), `traverse`
|
|
* applies the iterating function to each element of the `Array` and then [`sequence`](#sequence)-s
|
|
* the results using the provided `Applicative`.
|
|
*
|
|
* E.g. suppose you have an `Array` and you want to format each element with a function
|
|
* that returns a result or an error as `f = (a: A) => Either<Error, B>`, using `traverse`
|
|
* you can apply `f` to all elements and directly obtain as a result an `Either<Error,Array<B>>`
|
|
* i.e. an `Array<B>` if all the results are `B`, or an `Error` if some of the results
|
|
* are `Error`s.
|
|
*
|
|
* @example
|
|
* import { traverse } from 'fp-ts/Array'
|
|
* import { Applicative, left, right } from "fp-ts/lib/Either";
|
|
*
|
|
* const f = (x: unknown) =>
|
|
* typeof x === "string" ? right(x.toUpperCase()) : left(new Error("not a string"));
|
|
* assert.deepStrictEqual(traverse(Applicative)(f)(["a", "b"]), right(["A", "B"]));
|
|
* assert.deepStrictEqual(traverse(Applicative)(f)(["a", 5]), left(new Error("not a string")));
|
|
*
|
|
* @category traversing
|
|
* @since 2.6.3
|
|
*/
|
|
export var traverse = function (F) {
|
|
var traverseWithIndexF = traverseWithIndex(F);
|
|
return function (f) { return traverseWithIndexF(function (_, a) { return f(a); }); };
|
|
};
|
|
/**
|
|
* `sequence` takes an `Array` where elements are `HKT<A>` (higher kinded type) and,
|
|
* using an applicative of that `HKT`, returns an `HKT` of `Array<A>`.
|
|
* E.g. it can turn an `Array<Either<Error, string>>` into an `Either<Error, Array<string>>`.
|
|
*
|
|
* `sequence` requires an `Applicative` of the `HKT` you are targeting, e.g. to turn an
|
|
* `Array<Either<E, A>>` into an `Either<E, Array<A>>`, it needs an
|
|
* `Applicative` for `Either`, to to turn an `Array<Option<A>>` into an `Option<Array<A>>`,
|
|
* it needs an `Applicative` for `Option`.
|
|
*
|
|
* @example
|
|
* import { sequence } from 'fp-ts/Array'
|
|
* import { Applicative, left, right } from "fp-ts/lib/Either";
|
|
*
|
|
* assert.deepStrictEqual(sequence(Applicative)([right("a"), right("b")]), right(["a", "b"]));
|
|
* assert.deepStrictEqual(
|
|
* sequence(Applicative)([right("a"), left(new Error("not a string"))]),
|
|
* left(new Error("not a string"))
|
|
* );
|
|
*
|
|
* @category traversing
|
|
* @since 2.6.3
|
|
*/
|
|
export var sequence = function (F) {
|
|
return function (ta) {
|
|
return _reduce(ta, F.of(zero()), function (fas, fa) {
|
|
return F.ap(F.map(fas, function (as) { return function (a) { return pipe(as, append(a)); }; }), fa);
|
|
});
|
|
};
|
|
};
|
|
/**
|
|
* Same as [`traverse`](#traverse) but passing also the index to the iterating function.
|
|
*
|
|
* @example
|
|
* import { traverseWithIndex } from 'fp-ts/Array'
|
|
* import { Applicative, left, right } from "fp-ts/lib/Either";
|
|
*
|
|
* const f = (index:number, x:unknown) =>
|
|
* typeof x === "string" ? right(x.toUpperCase() + index) : left(new Error("not a string"));
|
|
* assert.deepStrictEqual(traverseWithIndex(Applicative)(f)(["a", "b"]), right(["A0", "B1"]));
|
|
* assert.deepStrictEqual(traverseWithIndex(Applicative)(f)(["a", 5]), left(new Error("not a string")));
|
|
*
|
|
* @category sequencing
|
|
* @since 2.6.3
|
|
*/
|
|
export var traverseWithIndex = function (F) {
|
|
return function (f) {
|
|
return reduceWithIndex(F.of(zero()), function (i, fbs, a) {
|
|
return F.ap(F.map(fbs, function (bs) { return function (b) { return pipe(bs, append(b)); }; }), f(i, a));
|
|
});
|
|
};
|
|
};
|
|
/**
|
|
* @category filtering
|
|
* @since 2.6.5
|
|
*/
|
|
export var wither = function (F) {
|
|
var _witherF = _wither(F);
|
|
return function (f) { return function (fa) { return _witherF(fa, f); }; };
|
|
};
|
|
/**
|
|
* @category filtering
|
|
* @since 2.6.5
|
|
*/
|
|
export var wilt = function (F) {
|
|
var _wiltF = _wilt(F);
|
|
return function (f) { return function (fa) { return _wiltF(fa, f); }; };
|
|
};
|
|
/**
|
|
* `unfold` takes a function `f` which returns an `Option` of a tuple containing an outcome
|
|
* value and an input for the following iteration.
|
|
* `unfold` applies `f` to the initial value `b` and then recursively to the second
|
|
* element of the tuple contained in the returned `option` of the previous
|
|
* calculation until `f` returns `Option.none`.
|
|
*
|
|
* @example
|
|
* import { unfold } from 'fp-ts/Array'
|
|
* import { option } from 'fp-ts'
|
|
*
|
|
* const f = (n: number) => {
|
|
* if (n <= 0) return option.none;
|
|
* const returnValue = n * 2;
|
|
* const inputForNextRound = n - 1;
|
|
* return option.some([returnValue, inputForNextRound] as const);
|
|
* };
|
|
* assert.deepStrictEqual(unfold(5, f), [10, 8, 6, 4, 2]);
|
|
*
|
|
* @since 2.6.6
|
|
*/
|
|
export var unfold = function (b, f) {
|
|
var out = [];
|
|
var bb = b;
|
|
// eslint-disable-next-line no-constant-condition
|
|
while (true) {
|
|
var mt = f(bb);
|
|
if (_.isSome(mt)) {
|
|
var _a = mt.value, a = _a[0], b_1 = _a[1];
|
|
out.push(a);
|
|
bb = b_1;
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
return out;
|
|
};
|
|
/**
|
|
* @category type lambdas
|
|
* @since 2.0.0
|
|
*/
|
|
export var URI = 'Array';
|
|
/**
|
|
* `getShow` makes a `Show` for an `Array<A>` from a `Show` for
|
|
* an `A`.
|
|
*
|
|
* @example
|
|
* import { getShow } from 'fp-ts/Array'
|
|
*
|
|
* const numShow = { show: (n: number) => (n >= 0 ? `${n}` : `(${-n})`) };
|
|
* assert.deepStrictEqual(getShow(numShow).show([-2, -1, 0, 1]), "[(2), (1), 0, 1]");
|
|
*
|
|
* @category instances
|
|
* @since 2.0.0
|
|
*/
|
|
export var getShow = RA.getShow;
|
|
/**
|
|
* Get a `Semigroup` based on the concatenation of `Array`s.
|
|
* See also [`getMonoid`](#getMonoid).
|
|
*
|
|
* @example
|
|
* import { getSemigroup } from 'fp-ts/Array'
|
|
*
|
|
* const S = getSemigroup<number>();
|
|
* assert.deepStrictEqual(S.concat([1, 2], [2, 3]), [1, 2, 2, 3]);
|
|
*
|
|
* @category instances
|
|
* @since 2.10.0
|
|
*/
|
|
export var getSemigroup = function () { return ({
|
|
concat: function (first, second) { return first.concat(second); }
|
|
}); };
|
|
/**
|
|
* Returns a `Monoid` for `Array<A>` based on the concatenation of `Array`s.
|
|
*
|
|
* @example
|
|
* import { getMonoid } from 'fp-ts/Array'
|
|
*
|
|
* const M = getMonoid<number>()
|
|
* assert.deepStrictEqual(M.concat([1, 2], [3, 4]), [1, 2, 3, 4])
|
|
*
|
|
* @category instances
|
|
* @since 2.0.0
|
|
*/
|
|
export var getMonoid = function () { return ({
|
|
concat: getSemigroup().concat,
|
|
empty: []
|
|
}); };
|
|
/**
|
|
* Derives an `Eq` over the `Array` of a given element type from the `Eq` of that type. The derived `Eq` defines two
|
|
* arrays as equal if all elements of both arrays are compared equal pairwise with the given `E`. In case of arrays of
|
|
* different lengths, the result is non equality.
|
|
*
|
|
* @example
|
|
* import * as S from 'fp-ts/string'
|
|
* import { getEq } from 'fp-ts/Array'
|
|
*
|
|
* const E = getEq(S.Eq)
|
|
* assert.strictEqual(E.equals(['a', 'b'], ['a', 'b']), true)
|
|
* assert.strictEqual(E.equals(['a'], []), false)
|
|
*
|
|
* @category instances
|
|
* @since 2.0.0
|
|
*/
|
|
export var getEq = RA.getEq;
|
|
/**
|
|
* Derives an `Ord` over the `Array` of a given element type from the `Ord` of that type. The ordering between two such
|
|
* arrays is equal to: the first non equal comparison of each arrays elements taken pairwise in increasing order, in
|
|
* case of equality over all the pairwise elements; the longest array is considered the greatest, if both arrays have
|
|
* the same length, the result is equality.
|
|
*
|
|
* @example
|
|
* import { getOrd } from 'fp-ts/Array'
|
|
* import * as S from 'fp-ts/string'
|
|
*
|
|
* const O = getOrd(S.Ord)
|
|
* assert.strictEqual(O.compare(['b'], ['a']), 1)
|
|
* assert.strictEqual(O.compare(['a'], ['a']), 0)
|
|
* assert.strictEqual(O.compare(['a'], ['b']), -1)
|
|
*
|
|
* @category instances
|
|
* @since 2.0.0
|
|
*/
|
|
export var getOrd = RA.getOrd;
|
|
/**
|
|
* Get a `Semigroup` based on the union of the elements of `Array`s.
|
|
* Elements which equal according to the provided `Eq` are included
|
|
* only once in the result.
|
|
* See also [`getUnionMonoid`](#getUnionMonoid).
|
|
*
|
|
* @example
|
|
* import { getUnionSemigroup } from 'fp-ts/Array';
|
|
* import { Eq } from 'fp-ts/number';
|
|
*
|
|
* const S = getUnionSemigroup<number>(Eq);
|
|
* assert.deepStrictEqual(S.concat([1, 2], [2, 3]), [1, 2, 3]);
|
|
*
|
|
* @category instances
|
|
* @since 2.11.0
|
|
*/
|
|
export var getUnionSemigroup = function (E) {
|
|
var unionE = union(E);
|
|
return {
|
|
concat: function (first, second) { return unionE(second)(first); }
|
|
};
|
|
};
|
|
/**
|
|
* Get a `Monoid` based on the union of the elements of `Array`s.
|
|
* Elements which equal according to the provided `Eq` are included
|
|
* only once in the result.
|
|
*
|
|
* @example
|
|
* import { getUnionMonoid } from 'fp-ts/Array'
|
|
* import { Eq } from 'fp-ts/number';
|
|
*
|
|
* const M = getUnionMonoid<number>(Eq);
|
|
* assert.deepStrictEqual(M.concat([1, 2], [2, 3]), [1, 2, 3]);
|
|
* assert.deepStrictEqual(M.empty,[]);
|
|
*
|
|
* @category instances
|
|
* @since 2.11.0
|
|
*/
|
|
export var getUnionMonoid = function (E) { return ({
|
|
concat: getUnionSemigroup(E).concat,
|
|
empty: []
|
|
}); };
|
|
/**
|
|
* Get a `Semigroup` based on the intersection of the elements of `Array`s.
|
|
* Only elements present in the two arrays which are equal according to the
|
|
* provided `Eq` are included in the result.
|
|
*
|
|
* @example
|
|
* import { getIntersectionSemigroup } from 'fp-ts/Array'
|
|
* import { Eq } from 'fp-ts/number';
|
|
*
|
|
* const S = getIntersectionSemigroup<number>(Eq);
|
|
* assert.deepStrictEqual(S.concat([1, 2], [2, 3]), [2]);
|
|
*
|
|
* @category instances
|
|
* @since 2.11.0
|
|
*/
|
|
export var getIntersectionSemigroup = function (E) {
|
|
var intersectionE = intersection(E);
|
|
return {
|
|
concat: function (first, second) { return intersectionE(second)(first); }
|
|
};
|
|
};
|
|
/**
|
|
* Get a `Magma` for `Array` where the `concat` function is the differnce between
|
|
* the first and the second array, i.e. the result contains all the elements of the
|
|
* first array for which their is no equal element in the second array according
|
|
* to the `Eq` provided.
|
|
*
|
|
*
|
|
* @example
|
|
* import { getDifferenceMagma } from 'fp-ts/Array'
|
|
* import { Eq } from 'fp-ts/number';
|
|
*
|
|
* const S = getDifferenceMagma<number>(Eq);
|
|
* assert.deepStrictEqual(S.concat([1, 2], [2, 3]), [1]);
|
|
*
|
|
* @category instances
|
|
* @since 2.11.0
|
|
*/
|
|
export var getDifferenceMagma = function (E) {
|
|
var differenceE = difference(E);
|
|
return {
|
|
concat: function (first, second) { return differenceE(second)(first); }
|
|
};
|
|
};
|
|
/**
|
|
* @category instances
|
|
* @since 2.7.0
|
|
*/
|
|
export var Functor = {
|
|
URI: URI,
|
|
map: _map
|
|
};
|
|
/**
|
|
* Given an input an `Array` of functions, `flap` returns an `Array` containing
|
|
* the results of applying each function to the given input.
|
|
*
|
|
* @example
|
|
* import { flap } from 'fp-ts/Array'
|
|
*
|
|
* const funs = [
|
|
* (n: number) => `Double: ${n * 2}`,
|
|
* (n: number) => `Triple: ${n * 3}`,
|
|
* (n: number) => `Square: ${n * n}`,
|
|
* ];
|
|
* assert.deepStrictEqual(flap(4)(funs), ['Double: 8', 'Triple: 12', 'Square: 16']);
|
|
*
|
|
* @category mapping
|
|
* @since 2.10.0
|
|
*/
|
|
export var flap = /*#__PURE__*/ flap_(Functor);
|
|
/**
|
|
* @category instances
|
|
* @since 2.10.0
|
|
*/
|
|
export var Pointed = {
|
|
URI: URI,
|
|
of: of
|
|
};
|
|
/**
|
|
* @category instances
|
|
* @since 2.7.0
|
|
*/
|
|
export var FunctorWithIndex = {
|
|
URI: URI,
|
|
map: _map,
|
|
mapWithIndex: _mapWithIndex
|
|
};
|
|
/**
|
|
* @category instances
|
|
* @since 2.10.0
|
|
*/
|
|
export var Apply = {
|
|
URI: URI,
|
|
map: _map,
|
|
ap: _ap
|
|
};
|
|
/**
|
|
* Combine two effectful actions, keeping only the result of the first.
|
|
*
|
|
* @since 2.5.0
|
|
*/
|
|
export var apFirst = /*#__PURE__*/ apFirst_(Apply);
|
|
/**
|
|
* Combine two effectful actions, keeping only the result of the second.
|
|
*
|
|
* @since 2.5.0
|
|
*/
|
|
export var apSecond = /*#__PURE__*/ apSecond_(Apply);
|
|
/**
|
|
* @category instances
|
|
* @since 2.7.0
|
|
*/
|
|
export var Applicative = {
|
|
URI: URI,
|
|
map: _map,
|
|
ap: _ap,
|
|
of: of
|
|
};
|
|
/**
|
|
* @category instances
|
|
* @since 2.10.0
|
|
*/
|
|
export var Chain = {
|
|
URI: URI,
|
|
map: _map,
|
|
ap: _ap,
|
|
chain: _chain
|
|
};
|
|
/**
|
|
* Composes computations in sequence, using the return value of one computation to determine the next computation and
|
|
* keeping only the result of the first.
|
|
*
|
|
* @example
|
|
* import * as A from 'fp-ts/Array'
|
|
* import { pipe } from 'fp-ts/function'
|
|
*
|
|
* assert.deepStrictEqual(
|
|
* pipe(
|
|
* [1, 2, 3],
|
|
* A.chainFirst(() => ['a', 'b'])
|
|
* ),
|
|
* [1, 1, 2, 2, 3, 3]
|
|
* )
|
|
* assert.deepStrictEqual(
|
|
* pipe(
|
|
* [1, 2, 3],
|
|
* A.chainFirst(() => [])
|
|
* ),
|
|
* []
|
|
* )
|
|
*
|
|
* @category sequencing
|
|
* @since 2.0.0
|
|
*/
|
|
export var chainFirst =
|
|
/*#__PURE__*/ chainFirst_(Chain);
|
|
/**
|
|
* @category instances
|
|
* @since 2.7.0
|
|
*/
|
|
export var Monad = {
|
|
URI: URI,
|
|
map: _map,
|
|
ap: _ap,
|
|
of: of,
|
|
chain: _chain
|
|
};
|
|
/**
|
|
* @category instances
|
|
* @since 2.7.0
|
|
*/
|
|
export var Unfoldable = {
|
|
URI: URI,
|
|
unfold: unfold
|
|
};
|
|
/**
|
|
* @category instances
|
|
* @since 2.7.0
|
|
*/
|
|
export var Alt = {
|
|
URI: URI,
|
|
map: _map,
|
|
alt: _alt
|
|
};
|
|
/**
|
|
* @category instances
|
|
* @since 2.11.0
|
|
*/
|
|
export var Zero = {
|
|
URI: URI,
|
|
zero: zero
|
|
};
|
|
/**
|
|
* @category do notation
|
|
* @since 2.11.0
|
|
*/
|
|
export var guard = /*#__PURE__*/ guard_(Zero, Pointed);
|
|
/**
|
|
* @category instances
|
|
* @since 2.7.0
|
|
*/
|
|
export var Alternative = {
|
|
URI: URI,
|
|
map: _map,
|
|
ap: _ap,
|
|
of: of,
|
|
alt: _alt,
|
|
zero: zero
|
|
};
|
|
/**
|
|
* @category instances
|
|
* @since 2.7.0
|
|
*/
|
|
export var Extend = {
|
|
URI: URI,
|
|
map: _map,
|
|
extend: _extend
|
|
};
|
|
/**
|
|
* @category instances
|
|
* @since 2.7.0
|
|
*/
|
|
export var Compactable = {
|
|
URI: URI,
|
|
compact: compact,
|
|
separate: separate
|
|
};
|
|
/**
|
|
* @category instances
|
|
* @since 2.7.0
|
|
*/
|
|
export var Filterable = {
|
|
URI: URI,
|
|
map: _map,
|
|
compact: compact,
|
|
separate: separate,
|
|
filter: _filter,
|
|
filterMap: _filterMap,
|
|
partition: _partition,
|
|
partitionMap: _partitionMap
|
|
};
|
|
/**
|
|
* @category instances
|
|
* @since 2.7.0
|
|
*/
|
|
export var FilterableWithIndex = {
|
|
URI: URI,
|
|
map: _map,
|
|
mapWithIndex: _mapWithIndex,
|
|
compact: compact,
|
|
separate: separate,
|
|
filter: _filter,
|
|
filterMap: _filterMap,
|
|
partition: _partition,
|
|
partitionMap: _partitionMap,
|
|
partitionMapWithIndex: _partitionMapWithIndex,
|
|
partitionWithIndex: _partitionWithIndex,
|
|
filterMapWithIndex: _filterMapWithIndex,
|
|
filterWithIndex: _filterWithIndex
|
|
};
|
|
/**
|
|
* @category instances
|
|
* @since 2.7.0
|
|
*/
|
|
export var Foldable = {
|
|
URI: URI,
|
|
reduce: _reduce,
|
|
foldMap: _foldMap,
|
|
reduceRight: _reduceRight
|
|
};
|
|
/**
|
|
* @category instances
|
|
* @since 2.7.0
|
|
*/
|
|
export var FoldableWithIndex = {
|
|
URI: URI,
|
|
reduce: _reduce,
|
|
foldMap: _foldMap,
|
|
reduceRight: _reduceRight,
|
|
reduceWithIndex: _reduceWithIndex,
|
|
foldMapWithIndex: _foldMapWithIndex,
|
|
reduceRightWithIndex: _reduceRightWithIndex
|
|
};
|
|
/**
|
|
* @category instances
|
|
* @since 2.7.0
|
|
*/
|
|
export var Traversable = {
|
|
URI: URI,
|
|
map: _map,
|
|
reduce: _reduce,
|
|
foldMap: _foldMap,
|
|
reduceRight: _reduceRight,
|
|
traverse: _traverse,
|
|
sequence: sequence
|
|
};
|
|
/**
|
|
* @category instances
|
|
* @since 2.7.0
|
|
*/
|
|
export var TraversableWithIndex = {
|
|
URI: URI,
|
|
map: _map,
|
|
mapWithIndex: _mapWithIndex,
|
|
reduce: _reduce,
|
|
foldMap: _foldMap,
|
|
reduceRight: _reduceRight,
|
|
reduceWithIndex: _reduceWithIndex,
|
|
foldMapWithIndex: _foldMapWithIndex,
|
|
reduceRightWithIndex: _reduceRightWithIndex,
|
|
traverse: _traverse,
|
|
sequence: sequence,
|
|
traverseWithIndex: _traverseWithIndex
|
|
};
|
|
var _wither = /*#__PURE__*/ witherDefault(Traversable, Compactable);
|
|
var _wilt = /*#__PURE__*/ wiltDefault(Traversable, Compactable);
|
|
/**
|
|
* @category instances
|
|
* @since 2.7.0
|
|
*/
|
|
export var Witherable = {
|
|
URI: URI,
|
|
map: _map,
|
|
compact: compact,
|
|
separate: separate,
|
|
filter: _filter,
|
|
filterMap: _filterMap,
|
|
partition: _partition,
|
|
partitionMap: _partitionMap,
|
|
reduce: _reduce,
|
|
foldMap: _foldMap,
|
|
reduceRight: _reduceRight,
|
|
traverse: _traverse,
|
|
sequence: sequence,
|
|
wither: _wither,
|
|
wilt: _wilt
|
|
};
|
|
/**
|
|
* @category sequencing
|
|
* @since 2.11.0
|
|
*/
|
|
export var chainRecDepthFirst = RA.chainRecDepthFirst;
|
|
/**
|
|
* @category instances
|
|
* @since 2.11.0
|
|
*/
|
|
export var ChainRecDepthFirst = {
|
|
URI: URI,
|
|
map: _map,
|
|
ap: _ap,
|
|
chain: _chain,
|
|
chainRec: _chainRecDepthFirst
|
|
};
|
|
/**
|
|
* @category sequencing
|
|
* @since 2.11.0
|
|
*/
|
|
export var chainRecBreadthFirst = RA.chainRecBreadthFirst;
|
|
/**
|
|
* @category instances
|
|
* @since 2.11.0
|
|
*/
|
|
export var ChainRecBreadthFirst = {
|
|
URI: URI,
|
|
map: _map,
|
|
ap: _ap,
|
|
chain: _chain,
|
|
chainRec: _chainRecBreadthFirst
|
|
};
|
|
/**
|
|
* Filter values inside a context.
|
|
*
|
|
* @since 2.11.0
|
|
*/
|
|
export var filterE = /*#__PURE__*/ filterE_(Witherable);
|
|
/**
|
|
* @category instances
|
|
* @since 2.11.0
|
|
*/
|
|
export var FromEither = {
|
|
URI: URI,
|
|
fromEither: fromEither
|
|
};
|
|
/**
|
|
* @category lifting
|
|
* @since 2.11.0
|
|
*/
|
|
export var fromEitherK = /*#__PURE__*/ fromEitherK_(FromEither);
|
|
// -------------------------------------------------------------------------------------
|
|
// unsafe
|
|
// -------------------------------------------------------------------------------------
|
|
/**
|
|
* @category unsafe
|
|
* @since 2.0.0
|
|
*/
|
|
export var unsafeInsertAt = NEA.unsafeInsertAt;
|
|
/**
|
|
* @category unsafe
|
|
* @since 2.0.0
|
|
*/
|
|
export var unsafeUpdateAt = function (i, a, as) {
|
|
return isNonEmpty(as) ? NEA.unsafeUpdateAt(i, a, as) : [];
|
|
};
|
|
/**
|
|
* @category unsafe
|
|
* @since 2.0.0
|
|
*/
|
|
export var unsafeDeleteAt = function (i, as) {
|
|
var xs = as.slice();
|
|
xs.splice(i, 1);
|
|
return xs;
|
|
};
|
|
// -------------------------------------------------------------------------------------
|
|
// utils
|
|
// -------------------------------------------------------------------------------------
|
|
/**
|
|
* `every` tells if the provided predicate holds true for every element in the `Array`.
|
|
*
|
|
* @example
|
|
* import { every } from 'fp-ts/Array'
|
|
*
|
|
* assert.equal(every((x: number) => x >= 0)([1, 2, 3]), true);
|
|
* assert.equal(every((x: number) => x >= 0)([-1, 2, 3]), false);
|
|
*
|
|
* @since 2.9.0
|
|
*/
|
|
export var every = RA.every;
|
|
/**
|
|
* `some` tells if the provided predicate holds true at least for one element in the `Array`.
|
|
*
|
|
* @example
|
|
* import { some } from 'fp-ts/Array'
|
|
*
|
|
* assert.equal(some((x: number) => x >= 0)([1, 2, 3]), true);
|
|
* assert.equal(some((x: number) => x >= 10)([1, 2, 3]), false);
|
|
*
|
|
* @since 2.9.0
|
|
*/
|
|
export var some = function (predicate) {
|
|
return function (as) {
|
|
return as.some(predicate);
|
|
};
|
|
};
|
|
/**
|
|
* Alias of [`some`](#some)
|
|
*
|
|
* @since 2.11.0
|
|
*/
|
|
export var exists = some;
|
|
/**
|
|
* Places an element in between members of an `Array`, then folds the results using the provided `Monoid`.
|
|
*
|
|
* @example
|
|
* import * as S from 'fp-ts/string'
|
|
* import { intercalate } from 'fp-ts/Array'
|
|
*
|
|
* assert.deepStrictEqual(intercalate(S.Monoid)('-')(['a', 'b', 'c']), 'a-b-c')
|
|
*
|
|
* @since 2.12.0
|
|
*/
|
|
export var intercalate = RA.intercalate;
|
|
// -------------------------------------------------------------------------------------
|
|
// do notation
|
|
// -------------------------------------------------------------------------------------
|
|
/**
|
|
* @category do notation
|
|
* @since 2.9.0
|
|
*/
|
|
export var Do = /*#__PURE__*/ of(_.emptyRecord);
|
|
/**
|
|
* @category do notation
|
|
* @since 2.8.0
|
|
*/
|
|
export var bindTo = /*#__PURE__*/ bindTo_(Functor);
|
|
var let_ = /*#__PURE__*/ let__(Functor);
|
|
export {
|
|
/**
|
|
* @category do notation
|
|
* @since 2.13.0
|
|
*/
|
|
let_ as let };
|
|
/**
|
|
* @category do notation
|
|
* @since 2.8.0
|
|
*/
|
|
export var bind = /*#__PURE__*/ bind_(Chain);
|
|
/**
|
|
* @category do notation
|
|
* @since 2.8.0
|
|
*/
|
|
export var apS = /*#__PURE__*/ apS_(Apply);
|
|
// -------------------------------------------------------------------------------------
|
|
// deprecated
|
|
// -------------------------------------------------------------------------------------
|
|
/**
|
|
* Use `NonEmptyArray` module instead.
|
|
*
|
|
* @category zone of death
|
|
* @since 2.0.0
|
|
* @deprecated
|
|
*/
|
|
export var range = NEA.range;
|
|
/**
|
|
* Use a new `[]` instead.
|
|
*
|
|
* @category zone of death
|
|
* @since 2.0.0
|
|
* @deprecated
|
|
*/
|
|
export var empty = [];
|
|
/**
|
|
* Use `prepend` instead.
|
|
*
|
|
* @category zone of death
|
|
* @since 2.0.0
|
|
* @deprecated
|
|
*/
|
|
export var cons = NEA.cons;
|
|
/**
|
|
* Use `append` instead.
|
|
*
|
|
* @category zone of death
|
|
* @since 2.0.0
|
|
* @deprecated
|
|
*/
|
|
export var snoc = NEA.snoc;
|
|
/**
|
|
* Use `prependAll` instead
|
|
*
|
|
* @category zone of death
|
|
* @since 2.9.0
|
|
* @deprecated
|
|
*/
|
|
export var prependToAll = prependAll;
|
|
/**
|
|
* This instance is deprecated, use small, specific instances instead.
|
|
* For example if a function needs a `Functor` instance, pass `A.Functor` instead of `A.array`
|
|
* (where `A` is from `import A from 'fp-ts/Array'`)
|
|
*
|
|
* @category zone of death
|
|
* @since 2.0.0
|
|
* @deprecated
|
|
*/
|
|
export var array = {
|
|
URI: URI,
|
|
compact: compact,
|
|
separate: separate,
|
|
map: _map,
|
|
ap: _ap,
|
|
of: of,
|
|
chain: _chain,
|
|
filter: _filter,
|
|
filterMap: _filterMap,
|
|
partition: _partition,
|
|
partitionMap: _partitionMap,
|
|
mapWithIndex: _mapWithIndex,
|
|
partitionMapWithIndex: _partitionMapWithIndex,
|
|
partitionWithIndex: _partitionWithIndex,
|
|
filterMapWithIndex: _filterMapWithIndex,
|
|
filterWithIndex: _filterWithIndex,
|
|
alt: _alt,
|
|
zero: zero,
|
|
unfold: unfold,
|
|
reduce: _reduce,
|
|
foldMap: _foldMap,
|
|
reduceRight: _reduceRight,
|
|
traverse: _traverse,
|
|
sequence: sequence,
|
|
reduceWithIndex: _reduceWithIndex,
|
|
foldMapWithIndex: _foldMapWithIndex,
|
|
reduceRightWithIndex: _reduceRightWithIndex,
|
|
traverseWithIndex: _traverseWithIndex,
|
|
extend: _extend,
|
|
wither: _wither,
|
|
wilt: _wilt
|
|
};
|