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