advanced random methods for underscore

_.random.js

/*
_.random.str() : "Quick"
_.random.str(3) : "Jumps Jumps Fox"
_.random.list() : [43, 65, 52, 65, 49]
_.random.list(3) : [43, 65, 49]
*/
(function(){
    var methods = {
		num:function(num1,num2){
			num1=num1||100;
			return _.random(num1,num2);
		},
		str:function(wordCount,words){
			if(!words && typeof wordCount == "string"){
				words = wordCount;
				wordCount=1;
			}
			wordCount = wordCount||1;

			words = words||"The Quick Brown Fox Jumps Over The Lazy Dog".split(" ");
			str = _.random.select(words,wordCount).join(" ");
			return str;
		},
		select:function(vals,count){
			count = count||1;
			vals = vals||_.range(10);
			return _.random.list(count,function(){
				return vals[_.random.num(vals.length-1)]
			});
		},
		list:function(count,callback){
			count = count||5;
			var range = _.range(count);
			if(!callback)callback = function(){
				return _.random.num();
			};
			return _.map(range,callback);
		}
	};
	function setup(){
		_.extend(_.random,methods);	
		return _.random;
	}
	if(window._)setup();
	if(window.define&&window.require){
		define("_.random",["underscore"],setup);
	}
})();