Re: Need help with comparison code

You have opened both IN and OUT using the same mode. You probably mean:

open IN,'<',$matchfile or die "Could not open $matchfile\n";
open OUT,'>>,$outfile or die "Could not open $outfile\n";
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Foreach syntax: foreach $var (@array)
For syntax: for (expression; condition; control)
I think you want to use two foreach commands here:

foreach my $file (@files) {
  foreach my $file2 (<IN>) {
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Re^2: Need help with comparison code by GrandFather (Saint) on Feb 03, 2011 at 03:52 UTC
`for/foreach (<$fh>)` is generally a bad idea - it implies slurping the file and creating a list of lines internally. Better is to use a `while (<$fh>)` loop. In both cases the loop body handles things a line at a time, but while is a better semantic match and is likely to be much more memory (and possibly slightly more time) efficient. True laziness is hard work	[reply] [d/l] [select]
Re^2: Need help with comparison code by Gulliver (Monk) on Feb 02, 2011 at 18:52 UTC
I believe that foreach is a synonym for 'for' in Perl. 22562 also Foreach Loops	[reply]