Creates a namespace based upon a string representation of a namespace. Adapted from a similar function in JavaScript Patterns by Stoyan Stefanov.

namespace.js

/*
 * Creates a namespace based upon a string representation of a namespace.
 * Adapted from a similar function in JavaScript Patterns by Stoyan Stefanov.
 *
 * @param {String} ns String representation of namespace. Eg, 'foo.bar.baz.goo'
 * @returns {Object} Last object created in the namespace.
 */
void function() {

  var root = 'myapp';

  window[root] = window[root] || {};
  
  function namespace(ns) {
    var parts = ns.split('.');
    if (parts[0] === root) {
      parts = parts.slice(1);
    }
    var parent = window[root];
    for (var i = 0; i < parts.length; i++) {
      if (parent[parts[i]] == null) {
        parent[parts[i]] = {};
      }
      parent = parent[parts[i]];
    }
    return parent;
  };

  namespace('util').namespace = namespace;

}();