JavaScript數據結構：通過鍵值訪問的鍵/值

Question

我需要一個數據結構來存儲多個JavaScript對象，並能夠使用字符串ID（get/set/delete operations）訪問它們。

這裏是我需要存儲的物品的例子：

var Player = function(name) { 
    this.name = name; 
    this.x = 0; 
    this.y = 0; 
    this.toString = function() { 
    return 'player : ' + this.name + ' at ' + this.x + ', ' + this.y; 
    }; 
} 

我想用來存儲玩家的數據結構，並能夠獲得/設置/他們的名字刪除它們，就像players.get('Bob')以Bob爲玩家的名字。起初，我以爲我可以使用名稱作爲鍵的地圖（我使用collectionsjs的Dict）。但後來我無法從該項目的方法中訪問該名稱（在我的示例中爲toString）。

我可以使用常規數組，保留name屬性並實現自己的get/set/delete方法，但是我寧願使用可靠的數據結構，但找不到它。

在此先感謝：]

Answer 1

JavaScript對象將工作。

var players = []; 
players[0] = {"name":"Bob", "age":1}; 
players[1] = {"name":"John", "age":4}; 

for (var i in players) { 
    if (players[i].name == "Bob") { 
     alert("Bob is " + players[i].age); 
    } 
} 

編輯：

var players = []; 
players[0] = {"name":"Bob", "age":1}; 
players[1] = {"name":"John", "age":4}; 

players.forEach(function(player){ 
    if (player.name == "Bob") { 
     alert("Bob is " + player.age); 
    } 
}); 

Answer 2

var Players = function(){ 
    this.players = []; 
    this.add = function(player){ 
     this.players.push(player); 
    } 
    this.delete = function(name){ 
     for(var i=0;i<this.players.length;i++) 
      if(this.players[i].name==name) 
      { 
       var f = this.players.slice(i+1,this.players.length+1); 
       this.players = this.players.slice(0,i).concat(f); 
       return; 
      } 
    } 
    this.set = function(name,player){ 
      for(var i=0;i<this.players.length;i++) 
      if(this.players[i].name==name) 
      { 
       this.players[i] = player; 
       return; 
      } 
    } 
    this.show = function(){ 
     for(var i=0;i<this.players.length;i++) 
      console.log(this.players[i].toString()); 
    } 
} 

var p = new Players(); 
p.add(new Player('Lorem')); 
p.add(new Player('Ipsum')); 
p.show(); 
p.delete('Ipsum'); 
p.show(); 

Answer 3

什麼是不可靠的有關陣列？使用內置方法IMO。一個簡單的例子：

var players = []; 

var Player = function(name) { 
    this.name = name; 
    this.x = 0; 
    this.y = 0; 
    this.toString = function() { 
     return 'player : ' + this.name + ' at ' + this.x + ', ' + this.y; 
    }; 
} 

function getPlayerByName(name){ 
    return players.filter(function(p){ 
     return p.name.toLowerCase() === name.toLowerCase(); 
    })[0]; 
} 

// etc... 
players.push(new Player('foo')); 

var fetched = getPlayerByName('foo'); 

console.log(fetched); 

http://jsfiddle.net/cy39sqge/