下面用枚举类型来实现一副扑克牌的类：
//定义一个玩牌的类 function Card(suit,rank){ function inherit(p){ if(p==null) throw TypeError(); if(Object.create) return Object.create(p); var t = typeof p; if(t!=="object" && t!=="function") throw TypeError(); function f(){}; f.prototype = p; return new f();}function enumeration(namesToValues){ //这个虚拟的构造函数是返回值 var enumeration = function(){throw "Can't Instantiate Enumerations";}; //虚拟值继承自这个对象 var proto = enumeration.prototype = { constructor:enumeration, //标志类型 toString:function(){return this.name;}, valueOf:function(){return this.value;}, toJSON:function(){return this.name;} }; enumeration.values = []; //用以存放枚举对象的数组 //现在创建新类型的实例 for(name in namesToValues){ //遍历每个值 var e = inherit(proto); //创建一个代表它的对象 e.name = name; e.value = namesToValues[name]; enumeration[name] = e; enumeration.values.push(e); } //一个类方法，用来对类的实例进行迭代 enumeration.foreach = function(f,c){ for(var i = 0;i<this.values.length;i++){ f.call(c,this.values[i]); } }; //返回标志这个新类型的构造函数 return enumeration;}//定义一个玩牌的类function Card(suit,rank){ this.suit = suit; //每张牌都有花色 this.rank = rank; //以及点数}//使用枚举类型定义花色和点数Card.Suit = enumeration({Clubs:1,Diamonds:2,Hearts:3,Spades:4});Card.Rank = enumeration({Two:2,Three:3,Four:4,Five:5,Six:6,Seven:7,Eight:8,Nine:9,Ten:10,Jack:11,Queen:12,King:13,Ace:14});//定义用以描述牌面的文本Card.prototype.toString = function(){ return this.rank.toString() + " of " + this.suit.toString();};//比较两张扑克牌的大小Card.prototype.compareTo = function(){ if(this.rank < that.rank) return -1; if(this.rank < that.rank) return 1; return 0;};//以扑克牌的玩法规则对牌进行排序的函数Card.orderByRank = function(a,b){ return a.compareTo(b);};//以桥牌的玩法规则对扑克牌进行排序的函数Card.orderBySuit = function(a,b){ if(a.suit < b.suit) return -1; if(a.suit > b.suit) return 1; if(a.rank < b.rank) return -1; if(a.rank > b.rank) return 1; return 0;};//定义用以表示一副标准扑克牌的类function Deck(){ var cards = this.cards = []; Card.Suit.foreach(function(s){ Card.Rank.foreach(function(r){ cards.push(new Card(s,r)); }) });}//重新洗牌，并返回洗好的牌Deck.prototype.shuffle = function(){ //遍历数组中的每个元素，随机找出牌面最小的元素，并与之（当前遍历的元素）交换 var deck = this.cards,len = deck.length; for(var i = len - 1;i > 0;i--){ var r = Math.floor(Math.random() * (i + 1)),temp; //随机数 temp = deck[i],deck[i] = deck[r],deck[r] = temp; } return this;};//发牌的方法：返回牌的数组Deck.prototype.deal = function(n){ if(this.cards.length < 0) throw "Out of cards"; return this.cards.splice(this.cards.length - n,n);};var deck = (new Deck()).shuffle();var hand = deck.deal(13).sort(Card.orderBySuit); }
转载于:https://www.cnblogs.com/zjtTT/p/5043614.html
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