On Thu, 09 Feb 2006 11:23:48 -0700, Wayne Simmons wrote:
>>As of 15 minutes ago, suddenly the n+1'th member of the array is MATCHING
> $value. Here's an >iteration of the debug prints from the above loop...
>>... against ><
>>found match! >RX_43_0_0_001.gho< vs. ><
>
> looks more like someone is passing in an array with an empty value. Look at
> how the array is filled and see if there's an extra return somewhere (if
> reading from file). Otherwise it looks like that last value is empty, and of
> course *anything* =~ // ....
Not quite. An empty regex is equivalent to the *last* regex that worked:
% perl -le '$_ = "abc"; print /b/?"Yes":"No"; print //?"Yes":"No"; \
$_ = "xyz"; print //?"Yes":"No"'
Yes
Yes
No
perldoc perlop:
If the PATTERN evaluates to the empty string, the last success-
fully matched regular expression is used instead. In this case,
only the "g" and "c" flags on the empty pattern is honoured -
the other flags are taken from the original pattern. If no
match has previously succeeded, this will (silently) act
instead as a genuine empty pattern (which will always match).
--
Peter Scott
http://www.perlmedic.com/
http://www.perldebugged.com/
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