Erstellen Sie eine JavaScript-Hash-Tabelle Hashtable

<script type="text/javascript">
function Hashtable() {  
    this._hashValue= new Object();  
    this._iCount= 0;  
}  
 
Hashtable.prototype.add = function(strKey, value) {  
    if(typeof (strKey) == "string"){  
        this._hashValue[strKey]= typeof (value) != "undefined"? value : null;  
        this._iCount++;  
         returntrue;  
    }  
    else 
        throw"hash key not allow null!";  
}  
 
Hashtable.prototype.get = function (key) {  
    if (typeof (key)== "string" && this._hashValue[key] != typeof(&#39;undefined&#39;)) {  
        returnthis._hashValue[key];  
    }  
    if(typeof (key) == "number")  
        returnthis._getCellByIndex(key);  
    else 
        throw"hash value not allow null!";  
 
    returnnull;  
}  
 
Hashtable.prototype.contain = function(key) {  
    returnthis.get(key) != null;  
}  
 
Hashtable.prototype.findKey = function(iIndex) {  
    if(typeof (iIndex) == "number")  
        returnthis._getCellByIndex(iIndex, false);  
    else 
        throw"find key parameter must be a number!";  
}  
 
Hashtable.prototype.count = function () {  
    returnthis._iCount;  
} 
  
Hashtable.prototype._getCellByIndex = function(iIndex, bIsGetValue) {  
    vari = 0;  
    if(bIsGetValue == null) bIsGetValue = true;  
    for(var key in this._hashValue) {  
        if(i == iIndex) {  
            returnbIsGetValue ? this._hashValue[key] : key;  
        }  
        i++;  
    }  
    returnnull;  
}  
 
Hashtable.prototype.remove = function(key) {  
    for(var strKey in this._hashValue) {  
        if(key == strKey) 
        {  
            deletethis._hashValue[key];  
            this._iCount--;  
        }  
    }  
}  
 
Hashtable.prototype.clear = function () {  
    for (var key in this._hashValue) {  
        delete this._hashValue[key];  
    }  
    this._iCount = 0;  
}  
</script>