es-toolkit/dist/compat/array/uniqWith.js

A state-of-the-art, high-performance JavaScript utility library with a small bundle size and strong type annotations.

const require_uniqWith = require("../../array/uniqWith.js");
const require_isArrayLike = require("../predicate/isArrayLike.js");
const require_uniq = require("./uniq.js");
//#region src/compat/array/uniqWith.ts
/**
* This method is like `uniq`, except that it accepts a `comparator` which is used to determine the equality of elements.
*
* It creates a duplicate-free version of an array, in which only the first occurrence of each element is kept.
* If a `comparator` is provided, it will be invoked with two arguments: `(arrVal, othVal)` to compare elements.
* If no comparator is provided, shallow equality is used.
*
* The order of result values is determined by the order they appear in the input array.
*
* @template T - The type of elements in the array.
* @param arr  - The array to process.
* @param [comparator] - Optional function to compare elements for equality.
* @returns A new array with only unique values based on the comparator.
*
* @example
* const array = [1, 2, 2, 3];
* const result = uniqWith(array);
* // result will be [1, 2, 3]
*
* const array = [1, 2, 3];
* const result = uniqWith(array, (a, b) => a % 2 === b % 2)
* // result will be [1, 2]
*/
function uniqWith(arr, comparator) {
	if (!require_isArrayLike.isArrayLike(arr)) return [];
	if (typeof comparator !== "function") return require_uniq.uniq(Array.from(arr));
	return require_uniqWith.uniqWith(Array.from(arr), (kept, candidate) => comparator(candidate, kept));
}
//#endregion
exports.uniqWith = uniqWith;