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

A utility library for TypeScript.

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

//#region src/set/isShallowEqual.ts
/**
* `isShallowEqual(target, source)`
*
* Checks if the `target` set and `source` set contain the same values. Returns `true` if both sets have the same size and contain identical elements, `false` otherwise.
*
* ```ts
* isShallowEqual(new Set([1, 2, 3]), new Set([3, 2, 1])); // true
* isShallowEqual(new Set([1, 2]), new Set([1, 2, 3])); // false
* ```
*
* ```ts
* pipe(new Set([1, 2, 3]), isShallowEqual(new Set([3, 2, 1]))); // true
* pipe(new Set([1, 2]), isShallowEqual(new Set([1, 2, 3]))); // false
* ```
*/
const isShallowEqual = dfdlT((target, source) => {
	if (target.size !== source.size) return false;
	for (const a of target) if (!source.has(a)) return false;
	for (const b of source) if (!target.has(b)) return false;
	return true;
}, 2);

//#endregion
export { isShallowEqual };