hasmap with require.js, from http://stackoverflow.com/questions/368280/javascript-hashmap-equivalent

hashmap.js

define(function() {

	HashMap = function() {
		this._dict = [];
	}
	
	HashMap.prototype._get = function(key) {
		for (var i = 0, couplet; couplet = this._dict[i]; i++) {
			if (couplet[0] === key) {
				return couplet;
			}
		}
	}
	
	HashMap.prototype.put = function(key, value) {
		var couplet = this._get(key);
		if (couplet) {
			couplet[1] = value;
		} else {
			this._dict.push([ key, value ]);
		}
		return this; // for chaining
	}
	
	HashMap.prototype.get = function(key) {
		var couplet = this._get(key);
		if (couplet) {
			return couplet[1];
		}
	}
	
	HashMap.prototype.getKeys = function(){
		var ret =  [];
		for (var i = 0; couplet = this._dict[i]; i++) {
			ret.push(this._dict[i][0]);
		}
		return ret;
	}

	return HashMap;
});