recursive compose

gistfile1.js

function square(n) {
  return n * n;
}

function double(n) {
  return n * 2;
}

function compose() {
  var originalRecur = [];
  for(var i = 0; i < arguments.length; i++) {
    originalRecur.push(arguments[i]);
  }
  
  return function recurred() {
    if(arguments[1] == undefined) {
      return recurred.call(this, arguments[0], originalRecur);
    }
    
    var toRecur = arguments[1];
    if(toRecur.length == 0) {
      return arguments[0];
    } else {
      return recurred.call(this, toRecur[0](arguments[0]), toRecur.slice(1))
    }
  }
}

var squared_and_doubled = compose(function(n) { return n + 4 }, function(n) { return n + 5 });
console.log(squared_and_doubled(2));