es-toolkit/dist/fp/array/keyBy.mjs

A state-of-the-art, high-performance JavaScript utility library with a small bundle size and strong type annotations.

import { keyBy as keyBy$1 } from "../../array/keyBy.mjs";
//#region src/fp/array/keyBy.ts
/**
* Creates a function that indexes values by a derived key.
*
* The key selector receives each value, index, and full input array. When multiple values
* produce the same key, the last value wins, matching the main {@link keyBy} behavior.
*
* @template T - The type of elements in the array.
* @template K - The property-key type produced by the selector.
* @param getKey - Called with each value, index, and array to produce an object key.
* @returns A function that maps a readonly array to an object keyed by the derived keys.
*
* @example
* import { keyBy, pipe } from 'es-toolkit/fp';
*
* pipe([{ id: 'a', value: 1 }, { id: 'b', value: 2 }], keyBy(item => item.id));
* // => { a: { id: 'a', value: 1 }, b: { id: 'b', value: 2 } }
*/
function keyBy(getKey) {
	return function(array) {
		return keyBy$1(array, getKey);
	};
}
//#endregion
export { keyBy };