On Sat, Jan 01, 2011 at 03:42:46PM +0000, Dave Cross wrote: > Code like this is often simpler if you use the Unix filter model and > let the operating system take care of opening all the files. > > #!/usr/bin/env perl > > use strict; > use warnings; > > chomp(my @lines = <>); > > print @lines; That's one way of using up a lot of memory. > If this is in a file called 'join', you can run it like this: > > $ ./join < input.txt > output.txt Use the tools you've already got as part of the OS install: /usr/bin/tr -d '\012' < input.txt > output.txt -- rgds Stephen