objective c - for a strong collection instance, is assign it to nil equals to release it and assign to nil? -


so have strong collection variable x (of type nsmutablearray e.g.), when doing dealloc, if x = nil, same effect following? 

[x removeallobjects];  [x release]; // not needed in arc x = nil;

strictly speaking, 2 not identical. setting strong variable nil indeed release object. however, array removeallobjects if getting destroyed. if variable holds strong reference array, stay alive , not remove items contains.


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