by @kamicane

Accessor.js

(function(){

this.Accessor = function(singular, plural){

	singular = (singular || '').capitalize();
	if (!plural) plural = singular + 's';

	var accessor = {}, matchers = [];

	this['define' + singular] = function(key, value){
		if (typeOf(key) == 'regexp') matchers.push({regexp: key, action: value});
		else accessor[key] = value;
		return this;
	};

	this['define' + plural] = function(object){
		for (var key in object) accessor[key] = object[key];
		return this;
	};

	this['match' + singular] = function(name){
		for (var l = matchers.length; l--; l){
			var matcher = matchers[l], match = name.match(matcher.regexp);
			if (match && (match = match.slice(1))) return function(){
				return matcher.action.apply(this, Array.slice(arguments).append(match));
			};
		}
		return null;
	};

	this['lookup' + singular] = function(key){
		return accessor[key] || null;
	};

	this['lookup' + plural] = function(keys){
		return Object.subset(accessor, keys);
	};

	return this;

};

})();