Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation

Re: Merging text file

by aitap (Deacon)
on Sep 06, 2012 at 17:40 UTC ( #992156=note: print w/replies, xml ) Need Help??

in reply to Merging text file

You don't need to read the whole file in the memory. Program will not work if the files become very big. Using Tie::File (or even DBD::CSV) to work with files is a good practice. Anyway, this is an example how to work with your files line-by-line:
use warnings; use strict; open my $first, "<", "first.txt" || die "first.txt: $!\n"; # three-argument form of open is safer # scalar variables as filehandles are more modern than barewords open my $second, "<", "second.txt" || die "second.txt: $!\n"; while (! eof $first && ! eof $second) { # while both filehandles can b +e read chomp (my $fline = <$first>); # you can read the line and chomp at the same line chomp (my $sline = <$second>); print "${fline},${sline}\n"; } close $first; close $second;
(tested only syntax).
Sorry if my advice was wrong.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://992156]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others browsing the Monastery: (5)
As of 2016-10-26 05:42 GMT
Find Nodes?
    Voting Booth?
    How many different varieties (color, size, etc) of socks do you have in your sock drawer?

    Results (336 votes). Check out past polls.