JavaScript学习笔记整理_简单实现枚举类型,扑克牌应用
如下所示：
//实现枚举类型,扑克牌应用
functioncreatEnum(p){
//构造函数
varEnumeration=function(){throw'cannotInstantiateEnumerations';};
//重写原型并将原型赋值给变量proto
varproto=Enumeration.prototype={
constructor:Enumeration,
toString:function(){returnthis.name;},
valueOf:function(){returnthis.value;},
toJSON:function(){returnthis.name;}
};
//添加类属性,方法
Enumeration.values=[];
for(varninp){//将对象p的每个元素都单独转存到一个单独的对象o里面,并将这些对象o存入类属性values数组中
varo=Object.create(proto);//对象o继承了Enumeration的3个实例方法和构造函数
Enumeration.prototype.valueOf=function(){returnthis.value*1;};//重写原型的valueof方法
o.name=n;
o.value=p[n];
Enumeration[n]=o;//添加类属性name,值为对象o
Enumeration.values.push(o);
}
Enumeration.foreach=function(f,c){
for(vari=0;i<this.values.length;i++){
f.call(c,this.values[i]);
}
};
returnEnumeration;
}
//===
varCoin=creatEnum({Penny:1,Nickel:5,Dime:10,Quarter:25});
console.log(Coin);
/*结果:枚举对象Coin
{[Function]
values:
[{[Number:10]name:'Penny',value:1},
{[Number:50]name:'Nickel',value:5},
{[Number:100]name:'Dime',value:10},
{[Number:250]name:'Quarter',value:25}],
Penny:{[Number:10]name:'Penny',value:1},
Nickel:{[Number:50]name:'Nickel',value:5},
Dime:{[Number:100]name:'Dime',value:10},
Quarter:{[Number:250]name:'Quarter',value:25},
foreach:[Function]}
*/
console.log(Coin.Dime+2);//102Coin.Dime本身继承自枚举对象,继承并修改了valueof方法用来将value转化为数字做计算
//===使用函数creatEnum()来表示一副54张的扑克牌==
functionCard(suit,rank){
this.suit=suit;
this.rank=rank;
}
Card.Suit=creatEnum({Clubs:1,Diamonds:2,Heates:3,Spades:4,Joker:5});
Card.Rank=creatEnum({Three:3,Four:4,Five:5,Six:6,Seven:7,Eight:8,Nine:9,Ten:10,
Jack:11,Queen:12,King:13,Ace:14,Two:15,SmallJoker:16,BigJoker:17});
Card.prototype.toString=function(){
returnthis.rank.toString()+'of'+this.suit.toString();
};
Card.prototype.compareTo=function(that){
if(this.rank<that.rank)return-1;
if(this.rank>that.rank)return1;
return0;
};
Card.orderBySuit=function(a,b){
if(a.suit<b.suit)return-1;
if(a.suit>b.suit)return1;
return0;
};
Card.orderByRank=function(a,b){
if(a.rank<b.rank)return-1;
if(a.rank>b.rank)return1;
return0;
};
//定义一副标准扑克牌
functionDeck(){
varcards=this.cards=[];
Card.Suit.foreach(function(s){//对每个花色执行
if(s!=5){
Card.Rank.foreach(function(r){
if(r!=16&&r!=17){
cards.push(newCard(s,r));
}
});
}else{
Card.Rank.foreach(function(r){
if(r==16)cards.push(newCard(s,r));
if(r==17)cards.push(newCard(s,r));
});
}
});
}
//洗牌,并返回洗好的牌
Deck.prototype.shuffle=function(){
vardeck=this.cards,len=deck.length;
for(vari=len-1;i>0;i--){
varr=Math.floor(Math.random()*(i+1)),temp;
temp=deck[i],deck[i]=deck[r],deck[r]=temp;
}
returnthis;
};
//发牌,并返回牌的数组
Deck.prototype.deal=function(n){
if(this.cards.length<n)throw'Outofcards';
returnthis.cards.splice(this.cards.length-n,n);
};
//开始:
vardeck=newDeck();
vardeck1=deck.shuffle();
varn=17;
varhand1=deck1.deal(n).sort(Card.orderByRank);
for(vari=0;i<n;i++){
varbody=document.getElementById('body');
vardiv=document.createElement('div');
div.style.width='50px';
div.style.height='100px';
div.style.border='1pxsolidgray';
div.style.float='left';
div.innerHTML=hand1[i].suit.name+''+hand1[i].rank.name;
body.appendChild(div);
console.log(hand1[i].suit.name+''+hand1[i].rank.name);
}
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