everyutil/array/findMostFrequent.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.findMostFrequent = void 0;
/**
 * Returns the most frequently occurring element(s) in the array.
 * @author @dailker
 * @template T
 * @param {T[]} array
 * @returns {T[]}
 */
function findMostFrequent(array) {
    const freq = new Map();
    let max = 0;
    for (const item of array) {
        const count = (freq.get(item) ?? 0) + 1;
        freq.set(item, count);
        if (count > max)
            max = count;
    }
    return Array.from(freq.entries())
        .filter(([_, count]) => count === max)
        .map(([item]) => item);
}
exports.findMostFrequent = findMostFrequent;