Beefy Boxes and Bandwidth Generously Provided by pair Networks
Your skill will accomplish
what the force of many cannot

Multiple file handling

by stallion (Acolyte)
on Sep 12, 2012 at 14:12 UTC( #993232=perlquestion: print w/replies, xml ) Need Help??
stallion has asked for the wisdom of the Perl Monks concerning the following question:

Scenario: A variable is mentioned in multiple file names and im able to grep once only. I want the file names in which the variable is mentioned whereas im able to grep only one file name.

sub module{ my $File1 = $File::Find::name; $File1 =~ s,/,\\,g; if ( $File1 =~ /.+\.doc/i) { open FILE, $File1 ; if ( grep /$variable/, <FILE> ) { $FOUND = 1; $FUN1 = $_; } close FILE; } } return 1;

Here $variable contains the search tag.. Any suggestions how to proceed Thanks

Replies are listed 'Best First'.
Re: Multiple file handling
by moritz (Cardinal) on Sep 12, 2012 at 14:38 UTC
    Scenario: A variable is mentioned in multiple file names and im able to grep once only.

    Why should that be the case? That sounds like a rather odd restriction. If you absolutely must work with that restriction, you can do something like

    use autodie; use List::MoreUtils qw/uniq/; open my $F1, $filename1; open my $F2, $filename2; my @files = unique map $_->[0], grep $_->[1] =~ /$variable/, (map [$filename1, $_] <$F1>), (map [$filename2, $_] <$F2>), ;

    Of course that code is much slower and uses much more memory than if you'd just search file by file.

Re: Multiple file handling
by tobyink (Abbot) on Sep 12, 2012 at 14:56 UTC

    I'm not entirely sure I understand your requirements, but...

    use 5.010; use Path::Class qw(dir file); say "GOT $_" for grep_dir_recursively( qr(say), # pattern to grep for (with smartmatch) qr(\.pl$), # pattern to match file names (with smartmatch) '/home/tai/tmp', # directory to search ); sub grep_dir_recursively { my $text_pattern = shift; my $file_pattern = shift; my @results; for my $root (@_) { dir($root)->recurse(callback => sub { my $file = shift; return if $file->is_dir; return unless $file ~~ $file_pattern; my $fh = $file->open; while (<$fh>) { if ($_ ~~ $text_pattern) { push @results, $file; last; } } }); } return @results; }
    perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: perlquestion [id://993232]
Approved by Corion
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others chanting in the Monastery: (3)
As of 2016-08-30 02:00 GMT
Find Nodes?
    Voting Booth?
    The best thing I ever won in a lottery was:

    Results (410 votes). Check out past polls.