There's still nothing in %MYHASH. Yes, you're declaring scope for %MYHASH and everything but just because %MYHASH is declared doesn't mean anything is in it. You have to assign some value or another into it in order for a while to work. Until there's something in your hash your while will never get executed and nothing will get printed.

You probably want something like this: 

#!/usr/bin/perl -w 

use strict; 
my ($file_list, $file_data)=@ARGV; 
my %MYHASH; 
#create hash 
sub do_hash { 
    my $filename=shift; 
    open(FH, $filename) or die "Can't open $filename: $!\n"; 
    while(<FH>){ 
     my ($Name, $Data)=split,2; 
     $MYHASH{$Name} = $Data;
    } 
    
    close FH; 
}

do_hash('file_data'); 

foreach my $key (keys %MYHASH) { 
    print "$key => $MYHASH{$key}\n"; 
} 
exit;

[download]
Note the fact that %MYHASH is assigned a whole bunch 'o data from the file, and after do_hash is completed (and %MYHASH has stuff in it) THEN all the data is printed out. And BTW, it should've probably been split, 2 not split, 1.

Gary Blackburn
Trained Killer

In reply to Re: Re: Re: How can I deal with those big table data? by Trimbach
in thread How can I deal with those big table data? by Anonymous Monk

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