CodeFights solutions

 /*
 * A perfect array is an array in which
 * each element is equal to the length of the array
 *
 * @Input: array of integers
 * @Output:
 * true if @Input is a perfect array,
 * false otherwise
 *
 * @Example:
 * for [2, 2] output should be true
 * for [4, 4, 4] or [2, 1] output should be false
 */
function perfectArray(array) {

  for (var i = 0; i < array.length; i++) {
    if (i !== array.length) { // Change i to array[i]
      return false;
    }
  }
  return true;
}