Autoreleasing in Objective-C application when returning a value?

When you call autorelease you're handing your ownership to the nearest autorelease pool, to be released at the next drain.

Keep in mind that -autorelease is nothing but a delayed messaging facility. When you send -autorelease to an object, the current autorelease pool will add that object to its list, and when the pool is drained or released, it will send a -release message to every object in its list.

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