Setting an object nil versus release+realloc

Question

This is not a garbage collected environment

I have a class instance variable which at some point in my runtime, I need to re-initialize with a different data set than it

Answer 1

If you do myArr=nil; by itself, then you've lost the pointer to which you can send the release message to. There is no magic to release your object.

And, as Georg says, without being able to release your object, that memory has 'leaked'.