Category: JavaScript

Today, I'd like to talk about EventHub, our in-browser publish/subscribe system. EventHub does a very similar thing to OpenAjax Hub, but for slightly different reasons. Whereas OpenAjax Hub is designed to allow mash-ups of co-operating components from different sites, EventHub ...Read More

Most enterprise-scale language environments such as Java or .net, provide features like single-class-per-file (with on-demand loading); isolation; privacy and namespacing of code; refactoring capabilities; UI paradigms, encouraging separation of concerns; unit and acceptance testing tools with integrated debugging, etc... JavaScript and ...Read More

Today is launch day for Windows 8 and the many laptop / tablet hybrids that will come along with it. The slightly in your face metro UI is a big gamble for MS but it certainly looks touch friendly so I ...Read More

Object-oriented is mostly about encapsulation, but it's also about interfaces and inheritance. However, years of experience have caused most programmers to realize that class inheritance is mostly a bad idea; it breaks encapsulation while increasing cognitive load by introducing cryptic indirection. ...Read More

One of the essential problems with any new technology is whether to adopt it and diabolically abandon users who are not able to upgrade or miss out on new possibilities and eventually become irrelevant. ...Read More

A puzzle to start things off - what is going on here? var a = "cat"; (function() { var a = "dog"; delete a; a ...Read More

Recently a talk given by Gary Bernhardt at CodeMash has been doing the rounds.  In it, he pokes fun at some apparently crazy behaviours in Ruby and Javascript. ...Read More

If you are interviewing prospective JavaScript developers and you feel like being a little bit mean then you could do worse than ask this question: In JavaScript, is it possible to call a function before it has ...Read More

For many applications, when you call a method the effect is immediate. For example calling a method like showErrorMessage("Error") will instantly update the page to give feedback to the user. However, not all applications are this simple. Caplin ...Read More

We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns – there are things we do not know we don't know. - Donald ...Read More