@monstermann/fn/dist/map/hasAll.js

A utility library for TypeScript.

import { dfdlT } from "@monstermann/dfdl";

//#region src/map/hasAll.ts
/**
* `hasAll(map, keys)`
*
* Checks if `map` contains all of the specified `keys`. This function supports iterables.
*
* ```ts
* hasAll(
*     new Map([
*         ["a", 1],
*         ["b", 2],
*         ["c", 3],
*     ]),
*     ["a", "b"],
* ); // true
*
* hasAll(
*     new Map([
*         ["a", 1],
*         ["b", 2],
*         ["c", 3],
*     ]),
*     ["a", "d"],
* ); // false
* ```
*
* ```ts
* pipe(
*     new Map([
*         ["a", 1],
*         ["b", 2],
*         ["c", 3],
*     ]),
*     hasAll(["a", "b"]),
* ); // true
*
* pipe(
*     new Map([
*         ["a", 1],
*         ["b", 2],
*         ["c", 3],
*     ]),
*     hasAll(["a", "d"]),
* ); // false
* ```
*/
const hasAll = dfdlT((target, keys) => {
	for (const key of keys) if (!target.has(key)) return false;
	return true;
}, 2);

//#endregion
export { hasAll };