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JavaScript's functional programming helper library.

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define(function () {

  // Returns a function that is the composition of a list of functions, each
  // consuming the return value of the function that follows.
  function compose() {
    var args = arguments;
    var start = args.length - 1;
    return function() {
      var i = start;
      var result = args[start].apply(this, arguments);
      while (i--) result = args[i].call(this, result);
      return result;
    };
  }

  return compose;

});