froebel/map.d.ts

TypeScript utility library

declare type MapFun = {
    <IK, IV, OK, OV>(data: Map<IK, IV>, callback: (key: IK, value: IV) => [OK, OV]): Map<OK, OV>;
    <T, O>(data: T[], callback: (element: T) => O): O[];
    <T, O>(data: Set<T>, callback: (element: T) => O): Set<O>;
    <T extends Record<string | number | symbol, unknown>, K extends string | number | symbol, V>(data: T, callback: (key: keyof T, value: T[keyof T]) => [K, V]): Record<K, V>;
};
/**
 * Map over `data`. `data` can be a regular object, a `Map`, a `Set`, or an
 * array.
 *
 * @example
 * ```
 * // -> { a: 1, b: 2 }
 * map({ a: '1', b: '2' }, (key, value) => [key, parseInt(value)])
 * ```
 *
 * @example
 * ```
 * // -> Map([ [2, 1], [4, 3] ])
 * map(new Map([ [1, 2], [3, 4] ]), (key, value) => [key + 1, value - 1])
 * ```
 */
declare const map: MapFun;
export default map;