randomNumber.js

function generator(low, high, post){
    return function(override){
        if (!post || typeof post !== "function") post = function(arg){return arg};
        return post( Math.random() * (high - low) + low );
    }
}

//example
var rand = generator(0,10); // random doubles between 0 and 10
var rand = generator(1,100,Math.round); // random ints between 1 and 100
var rand = generator(0,99,function(num){ return num.toString() }); // random double between 0 and 99 in a string