everyutil/array/arrayUniqueByKey.js

A comprehensive library of lightweight, reusable utility functions for JavaScript and TypeScript, designed to streamline common programming tasks such as string manipulation, array processing, date handling, and more.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.arrayUniqueByKey = void 0;
/**
 * Deduplicates array of objects by a given key or predicate.
 * @author @dailker
 * @template T, K
 * @param {T[]} array - Array of objects.
 * @param {(item: T) => K} keyFn - Function to get key.
 * @returns {T[]} Deduplicated array.
 */
function arrayUniqueByKey(array, keyFn) {
    const seen = new Set();
    return array.filter(item => {
        const key = keyFn(item);
        if (seen.has(key))
            return false;
        seen.add(key);
        return true;
    });
}
exports.arrayUniqueByKey = arrayUniqueByKey;