JavaScript chaining

chain.js

function chain(fn){
  // Chain factory
  var list = [fn];
  return function oneChain(fn){
    if (arguments.length) {
      list.push(fn);
      return oneChain;
    } else {
      var result;
      while (list.length) {
        result = list.shift()(result);
      }
      return result;
    }
  };
}

function three(){return 3}
function square(n){return n*n}

chain(three)(square)() === square(three());