Question

I want to alert is it executed well? after following line is executed in javascript

window["is"]("it")("executed")("well")("?")

window here means a global object. I have no idea what that above line is in javascript.

Answer 1

Evil recursion 🙂

arguments.callee refers to the function you are currently calling.

window.is = (function(len){
    var buffer = ["is"];
    return function(str) {
        buffer.push(str);
        if(buffer.length === len) {
            alert(buffer.join(" "));
        }
        else {
            return arguments.callee;            
        }
    }
}(5));

http://jsfiddle.net/tarabyte/wf8ag/