orange_tree_constructor_version.js

var createTree = function(){
  return new Tree()
}

var Tree = function Tree(){
  this.age = 0;
  this.height = 0;
  this.orangeCount = 0;
  this.isAlive = true;
  this.oranges = [];
}

var Orange = function Orange(){
  this.diameter = Math.floor((Math.random() * 5) + 1);
}

Tree.prototype.grow = function(){
  this.age += 1;
  this.height += 10;

  if (this.age >= FRUIT_BEARING_AGE){
    this.makeOranges()
  }
  if (this.age > MAX_AGE){
    this.killTree()
  }
};

Tree.prototype.makeOranges = function() {
  this.orangeCount = Math.floor((Math.random() * 10) + 1);
  for (var i =0; i < this.orangeCount; i++){
    this.oranges.push(new Orange());
  }
};
Tree.prototype.killTree = function() {
  this.isAlive = false;
};

Tree.prototype.dropOrange = function(){
  this.orangeCount -= 1;
  this.oranges.pop();
  return new Orange;
};

var pickOrange = function(tree){
  return tree.dropOrange()
}