Given a string `s`, determine whether or not it is possible to rearrange the letters in the string to make a palindrome. (Post manual "uglify")

CanMakePalindrome.js

CanMakePalindrome = (s, b, o, t) => {
  t = s.length % 2;
  o = [...s].filter(l => {
    b = s.split(l);
    s = b.join``;
    return (b.length - 1)%2;
  });
    
  return t ? (o.length === 1) : (o.length === 0);
}