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Re:Uses for Blocks in C/Objective-C by dchest on Thursday November 19, 2009 @08:51PM (#951663)
Garbage collection is already there in ObjC 2.0.
Re:Uses for Blocks in C/Objective-C by frankus on Friday November 20, 2009 @01:48PM (#953005)
...but not on the iPhone.

Speaking of which, are blocks supported by the iPhone's objC runtime?

UPDATE:

Unofficial support exists right now:

http://code.google.com/p/plblocks/