A thing that acts as a no-conflict stack for those times when you have to mutate the global namespace.

no-conflict.js

'use strict';

define(function(require)
{

var UNDEFINED = void 0;



function NoConflict(namespace)
{
	this._namespace = namespace ? namespace : window;
	this._stack = [];
}


NoConflict.prototype.push = function(key, value)
{
	var defined = this._namespace.hasOwnProperty(key);
	var state = {'key': key, 'value': this._namespace[key], 'defined': defined};
	this._stack.push(state);
	this._namespace[key] = value;
};


NoConflict.prototype.pop = function()
{
	var old = this._stack.pop();

	if (!old)
	{
		return null;
	}

	if (old.defined)
	{
		this._namespace[old.key] = old.value;
	} else {
		delete this._namespace[old.key];
	}

	return old;
};


NoConflict.prototype.empty = function()
{
	while (this.pop());
};


return NoConflict;

});