如何动态分配javascript对象的新成员？

假设我有一个javascript类，如下所示：

var Person = {
    //Private members

    getXmlRequestObj : function() {
            if (window.XMLHttpRequest) {
                return new XMLHttpRequest();
            } else if(window.ActiveXObject) {
                return new ActiveXObject("Microsoft.XMLHTTP");
            } else {
                return "Your Browser needs an upgrade";
            }
        },

initialize: function() {
        Person.importHTML = Person.getXmlRequestObj();
    },


    //Set up the global content retrieval object
    //called importHTML
    //importHTML:  new ActiveXObject("Microsoft.XMLHTTP"),

    _status:'',

    getAjaxList:function(sWhat,sUrl) {
        if (Person.importHTML.readyState == 4 || Person.importHTML.readyState == 0) {
            Person.importHTML.open("GET", sUrl, false);// make it wait for the response
            Person._sWhat = sWhat;
            Person.importHTML.onreadystatechange = Person.handleListArrived; 
            Person.importHTML.send(null);
        }       
    },
     handleListArrived: function() {
        if (Person.importHTML.readyState == 4) {
            if(Person._sWhat=="units")
                Person._unitList = Person.importHTML.responseText;
            if(Person._sWhat=="ranks")
                Person._rankList = Person.importHTML.responseText;
        }
    }
}

不要使用此代码：

            if(Person._sWhat=="units")
                Person._unitList = Person.importHTML.responseText;
            if(Person._sWhat=="ranks")
                Person._rankList = Person.importHTML.responseText;

我想让它使用任何人。什么是人的新成员。换句话说 如何动态地分配Person的新成员？从而使代码看起来像这样：

var Person = {
    //Private members

    getXmlRequestObj : function() {
            if (window.XMLHttpRequest) {
                return new XMLHttpRequest();
            } else if(window.ActiveXObject) {
                return new ActiveXObject("Microsoft.XMLHTTP");
            } else {
                return "Your Browser needs an upgrade";
            }
        },

initialize: function() {
        Person.importHTML = Person.getXmlRequestObj();
    },


    //Set up the global content retrieval object
    //called importHTML
    //importHTML:  new ActiveXObject("Microsoft.XMLHTTP"),

    _status:'',

    getAjaxList:function(sWhat,sUrl) {
        if (Person.importHTML.readyState == 4 || Person.importHTML.readyState == 0) {
            Person.importHTML.open("GET", sUrl, false);// make it wait for the response
            Person._sWhat = sWhat;
            Person.importHTML.onreadystatechange = Person.handleListArrived; 
            Person.importHTML.send(null);
        }       
    },
     handleListArrived: function() {
        if (Person.importHTML.readyState == 4) {
            if(Person._sWhat=="units")
                Person._unitList = Person.importHTML.responseText;
            if(Person._sWhat=="ranks")
                Person._rankList = Person.importHTML.responseText;
        }
    }
}

Person.something对Person的影响

getAjaxList:function(sWhat,sUrl) {
    if (Person.importHTML.readyState == 4 || Person.importHTML.readyState == 0) {
        Person.importHTML.open("GET", sUrl, false);// make it wait for the response
        Person.importHTML.onreadystatechange = Person.handleListArrived.bind(Person.importHTML, sWhat); //bind is supported in IE9+
        Person.importHTML.send(null);
    }       
},
handleListArrived: function(sWhat) {
    if (this.readyState == 4) {
        Person[sWhat] = this.responseText;
    }
}

或者，从ecmascript 1.3开始支持以下内容：

getAjaxList:function(sWhat,sUrl) {
    if (Person.importHTML.readyState == 4 || Person.importHTML.readyState == 0) {
        Person.importHTML.open("GET", sUrl, false);// make it wait for the response
        Person.importHTML.onreadystatechange = function(){ 
            Person.handleListArrived.call(Person.importHTML, sWhat); 
        };
        Person.importHTML.send(null);
    }       
}

---

点表示法在JavaScript中是一种方便的表示法，相当于方括号表示法：

Foo.xyz === Foo['xyz']

那么，在你的情况下

Person[Person._sWhat+"List"] = Person.importHTML.responseText

如果没有

\u sWhat

字段中的尾随

“s”

，就足够了。如果你能把它移到别处，那将是理想的。或者：

Person[Person._sWhat.slice(0,-1)+"List"] = Person.importHTML.responseText

---

var某物='units'；Person[某物]=Person.importHTML.responseText我回家后会试试这个…非常感谢！伟大的不要忘记接受对你最有帮助的答案。这对谁都有好处，对你也有好处。