functools.js

var functools = {
  partial: function (fun, thisObject) {
    var args = Array.slice(arguments, 2);
    return function () {
      Array.prototype.unshift.apply(arguments, args);
      return fun.apply(thisObject, arguments);
    }
  },
  compose: function () {
    var args = arguments;
    return function (val) {
      return Array.reduceRight(args, function (val, f) {
        return f(val);
      }, val)
    }
  }
};