node 可以这样来当缓存用么，求提意见

为了减轻数据库压力，但不用redis 或 memcache 不知道可行否 Data = new Object(); build();

function build(){

Data = new Object();
Data.repertory = new Array();

Data.del = function (key, value){
    if (typeof Data.repertory[key] == "undefined") {
        return true;
    }

    delete Data.repertory[key];
    return true;
}

Data.set = function (key, value){
    Data.repertory[key] = value;
    return true;
}

Data.get = function (key){
    if (typeof Data.repertory[key] == "undefined") {
        return false;
    }
    return Data.repertory[key];
}

Data.check = function (key, value){
    if (typeof Data.repertory[key] == "undefined"){
        return false;
    }

    if (Data.repertory[key] == value){
        return true;
    } else {
        return false;
    }
}

Data.inc = function (key, value){
    if (typeof Data.repertory[key] == "undefined"){
        return true;
    }

    Data.repertory[key] += value;
    return true;
}

Data.dec = function (key, value){
    if (typeof Data.repertory[key] == "undefined"){
        return true;
    }

    Data.repertory[key] -= value;
    return true;
}

Data.push = function (key, value){
    if (typeof Data.repertory[key] == "undefined"){
        Data.repertory[key] = new Array();
    }

    Data.repertory[key].push(value);
    return true;
}

Data.fun = function(fun){
    fun(Data.repertory);
}

Data.remove = function (key, value, flag){
    if (typeof Data.repertory[key] == "undefined"){
        return true;
    }

    var i;
    if (flag){
        for (i = 0; i<Data.repertory[key].length; i++){
            if (Data.repertory[key][i][flag] == value){
                Data.repertory[key].splice(i, 1);
                break;
            }
        }
    }  else {
        for (i = 0; i<Data.repertory[key].length; i++){
            if (Data.repertory[key][i] == value){
                Data.repertory[key].splice(i, 1);
                break;
            }
        }
    }
    return true;
}

}