Yet another get(x, path) and getIn(x, ks) in JavaScript

example.js

get([10, 20, {a: 30, b: 'foobar'}], '')       //=> [10, 20, {a: 30, b: 'foobar'}]
get([10, 20, {a: 30, b: 'foobar'}], '.2')     //=>          {a: 30, b: 'foobar'}
get([10, 20, {a: 30, b: 'foobar'}], '.2.b')   //=>                     'foobar'
get([10, 20, {a: 30, b: 'foobar'}], '.2.b.3') //=>                        'b'

gettin.js

function getIn(x, ks) {
  for (var i = 0, n = ks.length; x != null && i < n; i++) x = x[ks[i]];
  return x;
}

function get(x, path) {
  if (path == '') return x;
  if (path[0] != '.') return;
  return getIn(x, path.slice(1).split(/\./i));
}