Michael Dearman wrote:
> 
> That dit it! Change the 'unless' to 'if'. *chuckle*
> You know, I sat and looked at the 'return OK unless ...' and thought it
> didn't
> make sense.
> Thanks!
> M. Dearman

I just checked the example in my copy of the book and the line
had an 'if', which is correct, not an 'unless'.

Either you have an old edition of the book where it was a typo,
or you may have misread it when you typed.

/prakash

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