PERL Beginners - AW: Reading from a filehandle in while-loop

Author

AW: Reading from a filehandle in while-loop

Bastian Angerstein

2004-10-27, 8:55 am

Yes it should, but not on my system.

Thanks for your comments.

-----Ursprüngliche Nachricht-----
Von: Bob Showalter [mailto:Bob_Showalter@taylorwhite.com]
Gesendet: Dienstag, 26. Oktober 2004 16:00
An: 'David le Blanc'
Cc: beginners@perl.org
Betreff: RE: Reading from a filehandle in while-loop

David le Blanc wrote:
....
> You are making the assumption that '<TEST>' sets '$_' which is not
> true. Oddly, perl makes '<>' set $_, but not <FILE>... dunno why

Sorry, but that's just not correct.

while (<TEST> )

DOES set $_, as documented in perldoc perlop under the secion "I/O
Operators"

The OP has some other problem.

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Chasecreek Systemhouse

2004-10-27, 8:55 pm

On Wed, 27 Oct 2004 10:43:46 +0200, Bastian Angerstein
<ang@nmc-m.dtag.de> wrote:
> Yes it should, but not on my system.
>
> Thanks for your comments.
>

So, you are saying this doesnt work?

#!/usr/bin/perl -w

use strict;
use warnings;
use diagnostics;

open (TEST,"STDIN") or die "cannot read input file.";

while(<TEST> ) {

s/\W//g; # Clean out non-Alphanumeric...

my $input = ' ';
$input = $_ if length;

# Do other things with $input...
print "Seen $input\n";
}

__END__

???

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