Find the index of the longest array in an array of arrays

Question

If you have an array containing an indefinite amount of arrays

ex:

var masterArray = [ [1,2,3,4,5],
                    [1,2], 
                    [1,1,         


        

Answer 1

Try using while loop

var masterArray = [
  [1, 2, 3, 4, 5],
  [1, 2],
  [1, 1, 1, 1, 2, 2, 2, 2, 4, 4],
  [1, 2, 3, 4, 5]
];

var i = 0, len = masterArray.length;

while (i < len) {
  // if array[i + 1] exists
  // and array[i + 1] length greater than array[i] length
  // and i + 1 equals array length - 1
  // break
  if (masterArray[i + 1] 
      && masterArray[i + 1].length < masterArray[i].length 
      && i + 1 === len - 1) {
    break
  } 
  // else increment i
  else {
    ++i
  }
}

console.log(masterArray[i])