In the original example, myNum was being passed as a argument rather
than having a message to sent to it and itÂ’s often not safe to pass
nil objects as arguments.
Hmmm... well, what's the function it's passed to going to do with it,
other than call a method on it? If it's doing anything else, it's
breaking other (much stronger) rules.
Okay, so question 2: what else could be done other than calling
methods on it? I'm using NSNumbers in place of ints, floats and so on
partly as a learning exercise and partly to make it easier to convert
the number types rather than casting them. The library I had put
together (which was just an object with no instance variables)
originally used all floats (it's a math heavy library).
Ashley_______________________________________________
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