Cloning an Object in Node.js

Question

What is the best way to clone an object in node.js

e.g. I want to avoid the situation where:

var obj1 = {x: 5, y:5};
var obj2 = obj1;
obj2.x = 6;
con         


        

Answer 1

Looking for a true clone option, I stumbled across ridcully's link to here:

http://my.opera.com/GreyWyvern/blog/show.dml/1725165

I modified the solution on that page so that the function attached to the Object prototype is not enumerable. Here is my result:

Object.defineProperty(Object.prototype, 'clone', {
    enumerable: false,
    value: function() {
        var newObj = (this instanceof Array) ? [] : {};
        for (i in this) {
        if (i == 'clone') continue;
            if (this[i] && typeof this[i] == "object") {
                newObj[i] = this[i].clone();
            } else newObj[i] = this[i]
        } return newObj;
    }
});

Hopefully this helps someone else as well. Note that there are some caveats... particularly with properties named "clone". This works well for me. I don't take any credit for writing it. Again, I only changed how it was being defined.