The API Reference Scope page says:     A scope can inherit from a parent scope.   The Developer Guide Scope page says:     A scope (prototypically) inherits properties from its parent scope.   So, does a child scope always prototypically inherit fr...

I've been reading "Javascript: The Good Parts" by Douglas Crockford - and while it's a bit extreme, I'm on board with a lot of what he has to say.    In chapter 3, he discusses objects and at one point lays out a pattern (also f...

I'm seeing posts about a 'new' Object.create that makes enumeration configurable.  However, it relies on a Object.defineProperty method.  I can't find a cross browser implementation for this method.    Are we stuck writing for the o...

I have a situation where I need to check if a constructor (X) has another constructor (Y) in its prototype chain (or is Y itself).  The quickest means to do this might be (new X()) instanceof Y. That isn't an option in this case because the const...

I'm building a Node.js app with Connect/Express.js and I want to intercept the  res.render(view, option) function to run some code before forwarding it on to the original render function.  app.get('/someUrl', function(req, res) {      res...

Given simple JS inheritance, what's the practical difference in the base function between these two examples?  In other words, when should a person choose to define a function on "this" instead of on the prototype (or the other way around...

This example creates an object, freezes it, and then creates a new object from the frozen object. If the second object tries to change the test property, it can't. It remains frozen with the first object's value of 10.  //Create an object and...

I'm trying to get a deeper hold on prototypal inheritance and class creation (I know, there are other ways, but for the purpose of this I'm trying to grasp prototypes.) My question is: Using the following code example, is there a way to creat...

Background  I've been using the C preprocessor to manage and "compile" semi-large javascript projects with multiple files and build targets. This gives full access to C preprocessor directives like #include, #define, #ifdef, etc. from wit...

I often see this pattern to define javascript objects  function Person(name) {     this.name = name; } Person.prototype.describe = function () {     return "Person called "+this.name; };   And in this article it says that adding properties di...