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

A utility library for TypeScript.

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

//#region src/set/removeAll.ts
/**
* `removeAll(target, values)`
*
* Removes all `values` from an iterable from the `target` set and returns a new set. Only values that exist in the set are removed.
*
* ```ts
* removeAll(new Set([1, 2, 3, 4]), [2, 3]); // Set([1, 4])
* removeAll(new Set([1, 2, 3]), [4, 5]); // Set([1, 2, 3])
* ```
*
* ```ts
* pipe(new Set([1, 2, 3, 4]), removeAll([2, 3])); // Set([1, 4])
* pipe(new Set([1, 2, 3]), removeAll([4, 5])); // Set([1, 2, 3])
* ```
*/
const removeAll = dfdlT((target, values) => {
	let result;
	for (const value of values) {
		if (!target.has(value)) continue;
		result ??= cloneSet(target);
		result.delete(value);
	}
	return result ?? target;
}, 2);

//#endregion
export { removeAll };