Jovian Javascript

jovian.js

Object.prototype.setSlots = function(slots)
{
  for(var slotName in slots)
  {
    if(slots.hasOwnProperty(slotName))
    {
      this[slotName] = slots[slotName];
    }
  }
  return this;
}

Object.prototype.setSlots({
  clone: function()
  {
    var constructor = function(){};
    constructor.prototype = this;
    return new constructor;
  },
  
  newSlots: function()
  {
    var args = arguments;
    var i = args.length;

    while(i-- > 0) {
      this.newSlot(args[i]);
    }
    return this;
  },
  
  newSlot: function(slotName, initialValue)
  {
    if(arguments.length > 2)
    {
      throw "newSlot expected 2 arguments but there were " + arguments.length;
    }
    this[slotName] = function(){ return initialValue; };
    this['set' + slotName.asCapitalized()] = function(newValue){ initialValue = newValue; return this; };
    return this;
  }
});

var Dog = Object.prototype.clone()
.newSlot("voice", "Woof!")
.setSlots({
  speak: function()
  {
    console.log(this.voice());
  }
});

Dog.speak();

var sugar = Dog.clone().setVoice("Ruff!");
sugar.speak();