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Re: Merging text file

by aitap (Curate)
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.

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