Javascript find Deep Value

findDeepValue.js

function deepFind (path, obj) {
  var
    paths = path.split('.'),
    current = obj || this;

  for (var i = 0; i < paths.length; ++i) {
    if (current[paths[i]] == undefined) {
      return undefined;
    } else {
      current = current[paths[i]];
    }
  }
  return current;
}