There has been some debate on the efficiency of the new number types in AS3: int, uint and Number. So whats the most efficient? Answer: They are all almost the same. Performance difference only occurs when you convert the datatype (via casting) in code. Join discussion...

There are some interesting undocumented Date methods that can be used (pretty neat). For example, getting the last day of the previous month by getting the date for the 0th day of the current month. Join discussion...

The Number datatype's initial value is NaN. You cannot use n==null to test if that value has been set or not (it'll always return false). Instead use isNaN(n) Join discussion...

Explicitly call enterDebugger to break into the debugger from within code. Join discussion...

Embed javascript that swf calls within your mxml. The code does an eval to evaluate the js and then call it via external interface. Join discussion...

Using \ in a string will cause it to be deleted. Use \\ instead Join discussion...

How to load a flash 8 or previous swf into a as3 swf to access UI elements. Pretty neat Join discussion...

A good approach for instantiating Singletons by dynamic lookup. This technique is great if you are loading in a module into a swf that already has a class compiled in. Join discussion...