in reply to Re: Can't call method "curselection" on an undefined value
in thread Can't call method "curselection" on an undefined value

If no selection is made $lst->curselection is undefined

According to the posts title the problem of the OP seems to be, that $lst is undefined rather than the returnvalue of the curselection() call. His code example does not show that behavior, so it's hard to guess what's going on."


Cheers, CHristoph

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Re^3: Can't call method "curselection" on an undefined value
by GrandFather (Saint) on Apr 13, 2011 at 09:53 UTC

    The warning I highlighted is the only issue of that sort that the OP's sample code generates. My suspicion is that what we've been shown is a cleaned up version of the OP's real code and that the actual bug has been cleaned up in the process. Most likely that bug is related to using $lst as a global and is a result of it being altered somewhere in the code we're not shown. There is a reasonable chance that using the call back technique I demonstrated may solve the OP's problem.

    Quite likely the curselection undefined warning is a red herring, but avoiding globals may well fix the actual problem regardless.

    True laziness is hard work
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