Javascript Array Convert to Map

var arr1 = ["abc", 3, "yo"];
var arr2 = [42, "wassup", true];

function arrays_to_map(arr1, arr2) {
  var map = {};// w  ww  .ja  v  a  2s.  c om
  if (arr1.length != arr2.length) {
    return null;
  }
  for (var i = 0; i < arr1.length; i++) {
    map[arr1[i]] = arr2[i];
  }
  return map;
}

var result = arrays_to_map(arr1, arr2);
console.log(result);