HackerRank Challenge BirthCandles: https://www.hackerrank.com/challenges/birthday-cake-candles/problem?isFullScreen=true

birthdayCandle.js

function birthdayCakeCandles(candles) {
    const max = Math.max(...candles);
    let counter = 0;
    for(let candle of candles) {
        if (candle === max) counter++;
    }
    return counter;
}