// create some objects to store the data.
var columbian = {
 name: 'columbian',
 basePrice: 5
};
var frenchRoast = {
 name: 'french roast',
 basePrice: 8
};
var decaf = {
 name: 'decaf',
 basePrice: 6
};
// 我们将使用辅助函数计算价格
// 根据size打印到一个HTML的列表中
function printPrice(coffee, size) {
 if (size == 'small') {
  var price = coffee.basePrice + 2;
 }
 else if (size == 'medium') {
  var price = coffee.basePrice + 4;
 }
 else {
  var price = coffee.basePrice + 6;
 }
 // create the new html list item
 var node = document.createElement("li");
 var label = coffee.name + ' ' + size;
 var textnode = document.createTextNode(label+' price: $'+price);
 node.appendChild(textnode);
 document.getElementById('products').appendChild(node);
}
// 现在我们只需根据咖啡的各种价格和size的组合调用printPrice函数
printPrice(columbian, 'small');
printPrice(columbian, 'medium');
printPrice(columbian, 'large');
printPrice(frenchRoast, 'small');
printPrice(frenchRoast, 'medium');
printPrice(frenchRoast, 'large');
printPrice(decaf, 'small');
printPrice(decaf, 'medium');
printPrice(decaf, 'large');

// 从接口中分解数据和逻辑
var printPrice = function(price, label) {
 var node = document.createElement("li");
 var textnode = document.createTextNode(label+' price: $'+price);
 node.appendChild(textnode);
 document.getElementById('products 2').appendChild(node);
}
// 为每种咖啡创建函数对象
var columbian = function(){
 this.name = 'columbian';
 this.basePrice = 5;
};
var frenchRoast = function(){
 this.name = 'french roast';
 this.basePrice = 8;
};
var decaf = function(){
 this.name = 'decaf';
 this.basePrice = 6;
};
// 为每种size通过字面量创建对象
var small = {
 getPrice: function(){return this.basePrice + 2},
 getLabel: function(){return this.name + ' small'}
};
var medium = {
 getPrice: function(){return this.basePrice + 4},
 getLabel: function(){return this.name + ' medium'}
};
var large = {
 getPrice: function(){return this.basePrice + 6},
 getLabel: function(){return this.name + ' large'}
};
// 将所有咖啡的种类和size放到数组里
var coffeeTypes = [columbian, frenchRoast, decaf];
var coffeeSizes = [small, medium, large];
// 创建由上面内容组成的新对象，并把它们放到一个新数组里
var coffees = coffeeTypes.reduce(function(previous, current) {
 var newCoffee = coffeeSizes.map(function(mixin) {
  // `plusmix`是函数式的minxin, 见第7章
  var newCoffeeObj = plusMixin(current, mixin);
  return new newCoffeeObj();
 });
 return previous.concat(newCoffee);
},[]);
// 现在我们已经定义了如何获得所有咖啡种类和size组合方式的价格，现在可以直接打印它们了
coffees.forEach(function(coffee){
 printPrice(coffee.getPrice(),coffee.getLabel());
});

var peruvian = function(){
 this.name = 'peruvian';
 this.basePrice = 11;
};
var extraLarge = {
 getPrice: function(){return this.basePrice + 10},
 getLabel: function(){return this.name + ' extra large'}
};
coffeeTypes.push(Peruvian);
coffeeSizes.push(extraLarge);

coffeeTypes.reduce(function(previous, current) {
 var newCoffee = coffeeSizes.map(function(mixin) {
  // `plusMixin` function for functional mixins, see Ch.7
  var newCoffeeObj = plusMixin(current, mixin);
  return new newCoffeeObj();
 });
 return previous.concat(newCoffee);
},[]).forEach(function(coffee) {
 printPrice(coffee.getPrice(),coffee.getLabel());
});