JavaScript finding the largest integer in an array of arrays

Question

function largestOfFour(arr) {
    var newArray = [];
    for(var i =0; i <=arr.length-1; i++){
        console.log(arr[i]);
        newArray[i] = Math.max(arr[i]);
           


        

Answer 1

It won't work like that. Math.max expect separate numbers. You can get desired output using apply

function largestOfFour(arr) {
    return arr.map(function(subArr){
        return Math.max.apply(Math, subArr);
    });
}