@monstermann/fn/dist/object/mapMerge.js

A utility library for TypeScript.

import { merge } from "./merge.js";
import { dfdlT } from "@monstermann/dfdl";

//#region src/object/mapMerge.ts
/**
* `mapMerge(target, map)`
*
* Merges `target` object with the result of calling `map` function on `target`, creating a new object with existing keys updated.
*
* ```ts
* mapMerge({ a: 1, b: 2 }, (obj) => ({ a: obj.a * 2 })); // { a: 2, b: 2 }
* ```
*
* ```ts
* pipe(
*     { a: 1, b: 2 },
*     mapMerge((obj) => ({ a: obj.a * 2 })),
* ); // { a: 2, b: 2 }
* ```
*/
const mapMerge = dfdlT((target, map) => {
	return merge(target, map(target));
}, 2);

//#endregion
export { mapMerge };