Great Mac OS X Option key tips

http://www.macworld.com/article/142580/2009/09/optionkey.html?lsrc=rss_main

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Blocks in Snow Leopard Sound Awesome

John Siracusa's review of Snow Leopard is the definitive one. Of you
haven't read it, you should: http://arstechnica.com/apple/reviews/2009/08/mac-os-x-10-6.ars

The entire section called "Internals Ahead" really got me excited. I
felt the developer gravitational pull of new tech with Snow Leopard's
Grand Central Dispatch & Blocks as well a Clang built in to Xcode 3.2.

I never really understood anonymous functions before reading John's
stuff. I wouldn't say I oils apply this technique right now if called
to, but I really want to understand it.

I really want to start an OS X development project now just to use and
learn this stuff. Just need an idea...