mcall.js

!function(){
	Object.prototype.mcall = function(method, bind_this){
		var that = this
		var this_to_arg = true
		var fn = method
		if(typeof fn === "string" && fn.charAt(0) === ":"){
			fn = fn.substr(1)
			bind_this = window
		}
		else if(arguments.length < 2){
			bind_this = that
			this_to_arg = false
		}
		
		if(typeof method !== "function"){
			fn = (bind_this || window)[method]
		}
		return typeof fn === "function" ? function(){
			var args = [].slice.call(arguments)
			this_to_arg && args.unshift(that)
			var res = fn.apply(bind_this, args)
			return res == undefined ? new Undef : res
		} : Undef.maker
	}
	Object.prototype._ = Object.prototype.mcall
	
	Object.prototype.get = function(key){
		return this[key]
	}
	Object.prototype.__ = function(key){
		return this[key] == undefined ? new Undef : this[key]
	}
	
	function Undef(){
	}
	Undef.prototype.mcall = function(){
		return Undef.maker
	}
	Undef.prototype.isUndef = true
	Undef.maker = function(){
		return new Undef
	}
}()

usage.js

;["ab", "c;de"]
	._("pop")()
	._("split")(";")
	._("map")(function(e){return e+"-"})
	._("join")("_")
	._("getElementById", document)()
	._("getChildIds", null)()
	._("unshift")()
	._(parseInt, window)(16)
	._(":String")()

function getChildIds(elem){
	return [].map.call(elem.children, function(e){return e.id})
}



;({0:10,1:11,2:12,length:3})
	._(Array.prototype.slice)(1)


random_word()
	._("match")(/sample-([a-f][0-9]+)/)
	._("get")(1)
	._("getElementsByClassName", document)()
	._(Array.prototype.slice)()
	._("sort")(function(a,b){return a.dataset.order - b.dataset.order}))
	.__(4)
	._("getAttribute")("id")
   
function random_word(){
	var a = trueRate(50) ? "sample-" : strgen(6)
	var b = trueRate(80) ? "c63" : strgen(3)
	return a + b
	
	function strgen(n){
		return btoa(Math.random()).substr(0,n)
	}
	
	function trueRate(percent){
		return Math.random()*100 < percent
	}
}


a.__("b").__("c").__("d")


var v = x._("match")(/[0-9]+/).__(1)
if(!v.isUndef){
	y(v)
}

var val = v.isUndef ? undfined : v