Developing and Testing a Facebook application

Typically I develop my websites on trunk, then merge changes to a testing branch where they are put on a 'beta' website, and then finally they are merged onto a live branch and put onto the live website.

Why is "www.example.com” not the same as "example.com”?

I have a website. If I login in the domain of this format http://example.com and then change my address to http://www.example.com , i find my account is not logged in. If I change the address to http://example.com , I find my account is logged in.

Google Chome "Application Shortcut” Custom Javascript

Introduction

Google chrome has a feature that allows you to create shortcuts to web pages and make them appear like traditional desktop applications.

Distinguish new vs existing exceptions

I am creating a PHP application and I want to display the number of times an error has occurred. The problem that I am trying to figure out is if an error has already been reported or if its new using the following values: