http://www.perlmonks.org?node_id=655104


in reply to How can I use a text file as a search string?

If you are searching for literal strings, and don't *really* need regexs, then you could create a hash, where each name in the .txt file is one you're expecting. To search, you'd just use exists($hash{$name_to_check}) to see it was in your text file.
my @names_to_check = qw/ bob sue joe /; my %validnames = (); # build lookup while(<>) { chomp; $validnames{$_}++; # also filters dups in *.txt } # check names for (@names_to_check) { print "$_ is okay\n" if (exists($validnames{$_})); }
The <> of course implies STDIN, so you'd have to redirect or pipe the contents of *.txt into the script at the commandline.