On Wed, Aug 18, 2010 at 12:49 PM, Sherm Pendley <sherm.pend...@gmail.com> wrote:
> The "[foo release]" is perfectly correct, but if
> -stringByReplacingOccurrencesOfString:withString: is implemented with
> a simple "return self;" then *both* foo and bar would be immediately
> released. Implementing it as "return [[self retain] autorelease]"
> prevents such problems.

It doesn't violate the memory management guidelines to do so. The onus
is technically on the caller to retain bar if he wants to use it
later. See: 
http://developer.apple.com/mac/library/documentation/cocoa/conceptual/MemoryMgmt/Articles/mmAccessorMethods.html

--Kyle Sluder
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