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How not to remove trailing empty strings from an array

by ambrus (Abbot)
on Apr 16, 2013 at 10:54 UTC ( #1028872=perlmeditation: print w/replies, xml ) Need Help??

Just a quick note to document a funny error.

I tried to remove trailing empty strings from an array of strings with the following code.

pop @msgstr while !length($msgstr[-1]);

This didn't work. Can you guess why? Solution under the fold.

Replies are listed 'Best First'.
Re: How not to remove trailing empty strings from an array
by Neighbour (Friar) on Apr 16, 2013 at 14:32 UTC
Re: How not to remove trailing empty strings from an array
by LanX (Bishop) on Apr 16, 2013 at 17:17 UTC
    the problem comes from ...

    ...stringification of undef to ""

    I thought

    "" eq $arr[-1]
    could solve this, but no chance.

    Cheers Rolf

    ( addicted to the Perl Programming Language)

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