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

A utility library for TypeScript.

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

//#region src/map/hasNone.ts
/**
* `hasNone(map, keys)`
*
* Checks if `map` contains none of the specified `keys`. This function supports iterables.
*
* ```ts
* hasNone(
*     new Map([
*         ["a", 1],
*         ["b", 2],
*     ]),
*     ["c", "d"],
* ); // true
*
* hasNone(
*     new Map([
*         ["a", 1],
*         ["b", 2],
*     ]),
*     ["a", "c"],
* ); // false
* ```
*
* ```ts
* pipe(
*     new Map([
*         ["a", 1],
*         ["b", 2],
*     ]),
*     hasNone(["c", "d"]),
* ); // true
*
* pipe(
*     new Map([
*         ["a", 1],
*         ["b", 2],
*     ]),
*     hasNone(["a", "c"]),
* ); // false
* ```
*/
const hasNone = dfdlT((target, keys) => {
	for (const key of keys) if (target.has(key)) return false;
	return true;
}, 2);

//#endregion
export { hasNone };