i still don't understand, why you're usiińg substr() at all - instead of a regex

Speed

$str =~ s/_(\.mp3)$/$1/g;
# Or Much faster with the same result:
substr($str, -5, 1, "") if(substr($str, -5, 1) eq '_');

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If you do not need the power of metacharacters which a regex offers, don't use a regex. Using a regex for this opperation is like using a sledge hammer to pound in a small nail.

They say that time changes things, but you actually have to change them yourself.

—Andy Warhol

In reply to Re^2: Using substr to remove characters by JediWizard
in thread Using substr to remove characters by JediWizard

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