deep extend (like jQuery's) for nodeJS

Question

I am struggling with deep copies of objects in nodeJS. my own extend is crap. underscore\'s extend is flat. there are rather simple extend variants here on stackexchange, bu

Answer 1

This works for deep object extension... be warned that it replaces arrays rather than their values but that can obviously be updated how you like. It should maintain enumeration capabilities and all the other stuff you probably want it to do

function extend(dest, from) {
    var props = Object.getOwnPropertyNames(from), destination;

    props.forEach(function (name) {
        if (typeof from[name] === 'object') {
            if (typeof dest[name] !== 'object') {
                dest[name] = {}
            }
            extend(dest[name],from[name]);
        } else {
            destination = Object.getOwnPropertyDescriptor(from, name);
            Object.defineProperty(dest, name, destination);
        }
    });
}