functional repeat

gistfile1.js

Number.prototype.repeat = function(doSomething){
    var last = Math.floor(this);
    var ret = new Array(last);
    for(var i = 0; i < last; ++i){
        ret[i] = doSomething();
    }
    return ret;
};

// Example:
(5).repeat((function(){
    var i = 0;
    return function(){
        ++i;
        console.log(i);
        return i;
    };
})());

Working example: http://jsfiddle.net/fableal/FhK42/1/