Cached 'Functional' patterned mixin, using curry to invoke config parameters.

adding_curry_to_function_prototype.js

/* ========================================================================== 
  Cached 'Functional' patterned mixin, using curry to invoke config parameters.
===========================================================================*/

// Create curry prototype;
Function.prototype.curry = function(){
  var slice = Array.prototype.slice,
      args = slice.apply(arguments),
      that = this;
  
  return function(){
    return that.apply(this, args.concat(
      slice.apply(slice.apply(arguments))
    ));
  };
};

// Create the DragableMixin and cache it
var DraggableMixin = (function(){
  var startDrag = function(config, options){};
  var onDrag = function(){};
  
  return function(config){
    this.startDrag = startDrag.curry(config);
    this.onDrag = onDrag;
    return this;
  };
})();

var UserItemView = function(){};

DraggableMixin.call(UserItemView.prototype, {foo: 'bar'});