Shlomi Fish wrote:
On Thursday 19 Nov 2009 16:54:00 gaochong wrote:
Now I have see the following page ,but I have some question and need help .
http://www.cpan.org/authors/id/S/SU/SUJAI/Process-Detail-0.1.pl
the second , @array=split(/([A-Z]+(_|[A-Z])+\=.[^A-Z]+)/,$_);
also the re \=.[^A-Z]+ what’s it ?
\= is an actual "=". A "=" would be fine here, too. "." is any character
except a newline. "[^A-Z]" is any character except the uppercase Latin ASCII
letters ("A", "B", "C"..."Z"). "+" is "one or more" when applied to the
suffix. You can see signs of "ancient perl" in this expression, because it
uses several capturing parentheses ("(...)") instead of clustering ones
("(?:...)").
Capturing parentheses in a split() regular expression returns the
contents of the capturing parentheses as well as the strings that didn't
match the regular expression so using non-capturing parentheses would
do something completely different.
That being said, I agree wholeheartedly that this is one crappy Perl
program and should be avoided.
John
--
The programmer is fighting against the two most
destructive forces in the universe: entropy and
human stupidity. -- Damian Conway
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