FCC BAS #8 - Bonfire: Return Largest Numbers in Arrays

function largestOfFour(arr) {
    var largest = 0;
    var newArr = [];
    for(x=0; x<arr.length; x++) {    
        for(y=0; y<arr[x].length; y++){ console.log(arr[x][y]);
            if(arr[x][y]>largest) {
                largest = arr[x][y];
            }
        } newArr.push(largest);
    } return newArr;
}

largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]);

function largestOfFour(arr) {
  var newArray = [];
  for(i=0; i<arr.length; i++) {
    newArray.push(arr[i].sort(function(a,b) { return a < b; })[0]);
  }
  return newArray;
}