JS：join（） - 一個對象數組

Question

說我有一個對象數組，我希望能夠有時訪問哈希值（更改它們的值，呃？），有時會打印。

var test = { members : [] }; 
test.addMember = function(name, value) { 
    this.members[name] = { name : name, value : value }; 
    this.members[name].toString = function() { 
     return this.name + " has a " + this.value; }; 
}; 
test.toString = function() { 
    return this.members.join(" and "); 
}; 
test.addMember("a", "a value"); 
test.addMember("b", "b value"); 
alert(test); 

我在這裏的目標是有test.toString（）的返回：

a has a value and b has b value 

或什麼都有，你。我正在閱讀MDN，並且似乎JavaScript 1.8.5（或某個子視圖）將具有調用toString（）的join（）。我卡住了嗎？

謝謝！

編輯：這是我的最終設計，包含修改和刪除功能（萬一任何人都好奇）！

var test = { 
    members : [], 
    modifyMember : function(name, value) { 
     var index = this.members.indexOf(this.members[name]); 
     if(index < 0) { 
      return; 
     } 
     this.members[index].value = this.members[name].value = value; 
    }, 
    addMember : function(name, value) { 
     if(this.members[name]) { 
      this.modifyMember(name, value); 
      return; 
     } 
     this.members[name] = { 
      name : name, 
      value : value, 
      toString : function() { 
       return this.name + " has " + this.value; 
      }, 
     }; 
     this.members.push(this.members[name]); 
    }, 
    removeMember : function(name) { 
     if(!this.members[name]) return; 
     this.members.splice(this.members.indexOf(this.members[name]), 1); 
     delete this.members[name]; 
    }, 
    toString : function() { 
     return this.members.join(" AND "); 
    } 
}; 

Answer 1

您已經在使用屬性擴展您的數組。現在，不要忘記填充你的數組。使用Array.push()：

test.addMember = function(name, value) { 
    this.members[name] = { name : name, value : value }; 
    this.members.push(this.members[name]); 
    ... 
}; 

Answer 2

一種方式將是：（成員是一個對象）

var test = { members : {} }; 
test.addMember = function(name, value) { 
    this.members[name] = { name : name, value : value }; 
    this.members[name].toString = function() { 
     return this.name + " has a " + this.value; }; 
}; 
test.toString = function() { 
    var arr=[]; 
    for(var i in this.members) { 
     if (this.members.hasOwnProperty(i)){ 
      arr.push(this.members[i].toString()); 
     } 
    } 
    return arr.join(" and "); 
}; 
test.addMember("a", "a value"); 
test.addMember("b", "b value"); 
alert(test.toString()); 

而另一種方式（成員是一個數組）：

var test = { members : [] }; 
test.addMember = function(name, value) { 
    var arr= { name : name, value : value }; 
    arr.toString = function() { 
     return this.name + " has a " + this.value; 
    }; 
    this.members.push(arr); 
}; 
test.toString = function() { 
    return this.members.join(" and "); 
}; 
test.addMember("a", "a value"); 
test.addMember("b", "b value"); 
alert(test.toString());