Danko Kozar | Software Architect | GUI Geek

http://www.sencha.com/forum/showthread.php?329-createDelegate-...-huh

In JS, functions have no idea what object they are attached to and they don't care. The JS runtime generally manages setting the "this" reference in object methods for you automatically. In instances where you pass a function pointer, the "this" variable no longer is maintained for you automatically. createDelegate will bind a function to the correct object allowing you to pass a function pointer and have "this" continue to point to the correct object.

This one gave me a huge headache: Flex sometimes cannot extract parts of the AMF response - like sub-objects.

This is because you got to have the instance of the sub-object instantiated in your app before the call.

This isn't a compile-time issue as I thought  (like Flex didn't embed the object's class definition) but a runtime issue. If I load this sub-object as root object via another method call, the problematic method starts working.

Whenever you have a problem that Flex Builder / Flash Builder won't build / compile your Flex application (e.g. you are seing the "stale" version which is doing other stuff than your source code, breakpoints don't match etc.) try clearing the browser cache.

If you use Firebug, check Net > Disable Browser Cache.

Or you can, alternatively, go to about:config and set browser.cache.disk.enable = false.

Or this: network.http.use-cache = false.