Try this and see how you get on. Note the comments. 

#!perl     #Adjust for your system
use warnings;
use strict; # You did just forget these 2 lines?

my $lcount=0;        # Of course you'll need to declare your variables
+ with my
my $userout='';
my $listfile = "your filename";

# Always check that the open worked.
open(FILE, $listfile) or die "Couldn't open $listfile: $!\n";

while(my $user = <FILE>) {

#    $user =~ s/(\r|\n)//; # windows compatibility 
    chomp $user; # Does what you were trying to do above but works on 
+Macs as well

    $userout .= $user . ','; # Does the same.
    $lcount++;
    if ($lcount == 20) {
        print PIPE $userout; # no need to interpolate vars to print th
+em

        # I assume this means you want to print them to ALL to PIPE 20
+ at a time
        $lcount=0;    

        # In which case you need to clear $userout
        $userout = '';

        #If you only want the first 20 uncomment the next line 
        # last;
    }
#    next if !$user;    #No idea what you thought this did?
}

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In reply to Re: while loop over filehandle by BrowserUk
in thread while loop over filehandle by Anonymous Monk

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