@monstermann/fn/dist/set/isSupersetOf.js

A utility library for TypeScript.

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

//#region src/set/isSupersetOf.ts
/**
* `isSupersetOf(target, source)`
*
* Checks if the `target` set is a superset of the `source` set (i.e., all values in source exist in target). Returns `true` if target is a superset of source, `false` otherwise.
*
* ```ts
* isSupersetOf(new Set([1, 2, 3]), new Set([1, 2])); // true
* isSupersetOf(new Set([1, 2, 3]), new Set([1, 4])); // false
* ```
*
* ```ts
* pipe(new Set([1, 2, 3]), isSupersetOf(new Set([1, 2]))); // true
* pipe(new Set([1, 2, 3]), isSupersetOf(new Set([1, 4]))); // false
* ```
*/
const isSupersetOf = dfdlT((target, source) => {
	if (target.size < source.size) return false;
	for (const value of source) if (!target.has(value)) return false;
	return true;
}, 2);

//#endregion
export { isSupersetOf };