Easily ensure JS namespacing is setup before you access it.

README.md

JavaScript Namespacing

This lets you turn this:

window.Foods = window.Foods || {};
Foods.Grains = Foods.Grains || {};
Foods.Grains.Wheat = Foods.Grains.Wheat || {};

into this:

ns('Foods.Grains.Wheat');

Stolen From

• ns.js ~ http://hangar.runway7.net/javascript/namespacing
• arrayReduce.polyfill.js ~ http://www.tutorialspoint.com/javascript/array_reduce.htm

arrayReduce.polyfill.js

if (!Array.prototype.reduce)
{
  Array.prototype.reduce = function(fun /*, initial*/)
  {
    var len = this.length;
    if (typeof fun != "function")
      throw new TypeError();

    // no value to return if no initial value and an empty array
    if (len == 0 && arguments.length == 1)
      throw new TypeError();

    var i = 0;
    if (arguments.length >= 2)
    {
      var rv = arguments[1];
    }
    else
    {
      do
      {
        if (i in this)
        {
          rv = this[i++];
          break;
        }

        // if array contains no values, no initial value to return
        if (++i >= len)
          throw new TypeError();
      }
      while (true);
    }

    for (; i < len; i++)
    {
      if (i in this)
        rv = fun.call(null, rv, this[i], i, this);
    }

    return rv;
  };
}

ns.js

var ns = function(namespace){
  return namespace.split('.').reduce(function(holder, name){
    holder[name] = holder[name] || {};
    return holder[name];
  }, window);
};