How to chain functions without using prototype?

Question

I have a bunch of useful functions that I have collected during my whole life.

function one(num){
    return num+1;
}

function two(num){
    return num+2;
}         


        

Answer 1

A nice and general alternative is creating a custom function composition function

var go = function(x, fs){
   for(var i=0; i < fs.length; i++){
       x = fs[i](x);
   }
   return x;
}

You can call it like this:

go(5, [one, two, two])

I am personaly not a big fan of method chaining since it restricts you to a predefined set of functions and there is kind of an impedance mismatch between values inside the "chaining object" and free values outside.