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Re: Yet Another Unitialized Value Question

by Zaxo (Archbishop)
on Sep 22, 2003 at 18:25 UTC ( #293220=note: print w/replies, xml ) Need Help??

in reply to Yet Another Unitialized Value Question

You have a logic error.

To get to line 435, the object of unless must be true, i.e. ($lock, $updon) != (). $lock is therefore redefined everywhere between the unless block and the DONE: label. It may well be undef, if the database column contains nulls.

Update, corrected some confusion of mine.

After Compline,

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Re: Re: Yet Another Unitialized Value Question
by doorslam (Beadle) on Sep 22, 2003 at 18:49 UTC
    The column is a boolean flag with a not null constraint. I assume if fetchrow returns no rows, lock is undefined, but then I don't reference it again.

    If there is a row, then lock must be 0 or 1.
      Are you sure you have the right line?
      undef $lock; if ($lock) ...
      does not cause a warning for me (perl 5.8.0). It's not doing a numerical == comparison.

      Have you tried using the debugger?

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