62 lines
1.6 KiB
JavaScript
62 lines
1.6 KiB
JavaScript
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/**
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* @since 2.10.0
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*/
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import * as _ from './internal';
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// -------------------------------------------------------------------------------------
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// instances
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// -------------------------------------------------------------------------------------
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/**
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* Return a semigroup which works like `Object.assign`.
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*
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* @example
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* import { getAssignSemigroup } from 'fp-ts/struct'
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*
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* interface Person {
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* readonly name: string
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* readonly age: number
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* }
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*
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* const S = getAssignSemigroup<Person>()
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* assert.deepStrictEqual(S.concat({ name: 'name', age: 23 }, { name: 'name', age: 24 }), { name: 'name', age: 24 })
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*
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* @category instances
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* @since 2.10.0
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*/
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export var getAssignSemigroup = function () { return ({
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concat: function (first, second) { return Object.assign({}, first, second); }
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}); };
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// -------------------------------------------------------------------------------------
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// utils
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// -------------------------------------------------------------------------------------
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/**
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* Creates a new object by recursively evolving a shallow copy of `a`, according to the `transformation` functions.
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*
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* @example
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* import { pipe } from 'fp-ts/function'
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* import { evolve } from 'fp-ts/struct'
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*
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* assert.deepStrictEqual(
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* pipe(
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* { a: 'a', b: 1 },
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* evolve({
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* a: (a) => a.length,
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* b: (b) => b * 2
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* })
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* ),
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* { a: 1, b: 2 }
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* )
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*
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* @since 2.11.0
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*/
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export var evolve = function (transformations) {
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return function (a) {
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var out = {};
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for (var k in a) {
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if (_.has.call(a, k)) {
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out[k] = transformations[k](a[k]);
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}
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}
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return out;
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};
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};
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