more confusing sorting

confusing-sort.js

var items = ['0', '000', 0, 1, '001', 'a', 'z', 'A', 'Z', '!', null, undefined];

console.log('sorted', items.sort());

// defaults to string sort null becomes 'null'
// sorted [ '!', '0', 0, '000', '001', 1, 'A', 'Z', 'a', null, 'z', undefined ]

console.log('string sort', items.sort(function(a, b) {
  if (a < b) {
    console.log(typeof(a), a, '<', typeof(b), b, '== true');
    return -1;
  }

  if (a > b) {
    console.log(typeof(a), a, '>', typeof(b), b, '== true');
    return 1;
  }

  // a must be equal to b
  console.log(typeof(a), a, '(is not > or <)', typeof(b), b);
  return 0;

}));