js underscore

_.js

var _ = (function(){
	function _(){}
	_.prototype.compose = function(){
		var args = Array.prototype.slice.call(arguments);
		return args.reduce(function(f,g){
			return function(){
				return f(g.apply(this,arguments));
			};
		});
	};
	_.prototype.curry = function(){
		var args = Array.prototype.slice.call(arguments);
		var func = args.shift();
		return function(){
			var newArgs = Array.prototype.slice.call(arguments);
			return func.apply(undefined, args.map(function(v){
				if (v.constructor && v.constructor.name && v.constructor.name == '_')
					return newArgs.shift();
				return v;
			}));
		};
	};
	_.prototype.filter = function(func, data){
		data = Array.prototype.slice.call(data);
		return data.filter(func);
	};
	_.prototype.get = function(base, offset, fallback){
		try{
			return eval("base"+offset); 
		}catch(e){
			return fallback;
		}
	};
	_.prototype.map = function(func, data){
		data = Array.prototype.slice.call(data);
		return data.map(func);
	};
	_.prototype.reduce = function(func, data){
		data = Array.prototype.slice.call(data);
		return data.reduce(func);
	};
	return new _(); 
})();