[알고리즘] Find The Parity Outiler

javascript

You are given an array (which will have a length of at least 3, but could be very large) containing integers. The array is either entirely comprised of odd integers or entirely comprised of even integers except for a single integerN. Write a method that takes the array as an argument and returns this "outlier"N.

Examples

[2, 4, 0, 100, 4, 11, 2602, 36]
Should return: 11 (the only odd number)

[160, 3, 1719, 19, 11, 13, -21]
Should return: 160 (the only even number)

풀이

function findOutlier(integers){
  var even = integers.filter(a=>a%2==0);
  var odd = integers.filter(a=>a%2!=0);

  return even.length == 1 ? Number(even) : Number(odd);
}