I'd only rewrite it for learning purposes.

Anyway, take a look at Meta::Utils::Hash:

DESCRIPTION 

This is a general utility perl library for all kinds of hash routines.
+ This mainly iterates hashes using the each builtin which is the fast
+est to do the job and like the list library uses refernces to avoid d
+uplication whereever possible.

FUNCTIONS
...
filter_multi($$$$) 
    This one is a full filter. This gets: 0. a hash. 1. whether to do 
+filtering or not. 2. boolean indicating whether filter is negative or
+ positive. 3. list of modules for filtering data. And does the entire
+ filtering process in an efficient manner. 

filter_file_sing_regexp($$$) 
    This routine receives a hash and a regular expression and returns 
+a hash containing only the elements in the hash which are pointers to
+ files which contain a the regular expression. This also receives as 
+the third variable whether to print the matched lines or not (this is
+ passes along to Meta::Utils::File::File::check_sing_regexp). 
...

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In reply to Re: Request opinions and ideas by fglock
in thread Request opinions and ideas by gnu@perl

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