确实有问题，依你之见，应该如何实现c/c++虚函数、多态特性?

var Model = require("../models/Base"),
    dbMockup = {};

function test() {
    var model = new Model(dbMockup);
    var ModelA = model.extend({
        myMethodA : function() {}
    });

    var ModelB = model.extend({
        myMethodB : function() {}
    });

    var model_a = new ModelA(dbMockup);
    var model_b = new ModelB(dbMockup);  // myMethodB方法写入到model_a中
    if (model_a.db) {
        console.log("model_a.db is defined");
    }
    if (model_a.myMethodA) {
        console.log("model_a.myMethodA is defined");
    }
    if (model_a.myMethodB) {
        console.log("model_a.myMethodB is defined");
    }
}

test();

[coolbar@localhost test]$ node test.js
model_a.db is defined
model_a.myMethodA is defined
model_a.myMethodB is defined

【 在 XeCycle (据说是小 X) 的大作中提到: 】
: try
: var ExtendA = Model.extend({ methodA })
: var ExtendB = Model.extend({ methodB })
: ...................
--
FROM 60.186.191.*