in reply to Re: How can I sort this data on the first field
in thread How can I sort this data on the first field

Roy Johnson's solution works, but it is not warning free. The original problem seems to me to scream out for the use of a hash. Here is how I would have approached the problem:
use strict;
use warnings;

print "Content-type: text/html\n\n";

my %someData;

while(<DATA>)
   {
   chomp();
   (my $key, my $value) = split(/\|/, $_, 2);
   $someData{$key} = $value;
   }

foreach (sort { $a <=> $b } keys %someData)
   {
   print "$_\{$someData{$_}\}\n";
   }

__DATA__
30|microsoft
70|aol
76|netscape
5|trouble?
35|mozilla
40|opera
100|FireFox

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Re^3: How can I sort this data on the first field
by Chady (Priest) on Apr 26, 2005 at 06:19 UTC

    It's not a hash that you want... it's probably an array of arrays. What if there were duplicate keys? your hash will eat them up and you'll end up with only the last entry.

    compare: 
    print "With Hash:\n\n";

$save = tell DATA;

while(<DATA>) {
     my ($k, $v) = split '\|';
     $hash{$k} = $v;
}
print "$_|$hash{$_}" for sort { $a <=> $b } keys %hash;

seek DATA, $save, 0;

print "\n\nWith array:\n\n";
while(<DATA>) {
     my ($k, $v) = split '\|';
     push @arr, [$k, $v];
}
print "$_->[0]|$_->[1]" for sort { $a->[0] <=> $b->[0] } @arr;

__DATA__
30|microsoft
70|aol
76|netscape
5|trouble?
35|mozilla
30|die microsoft
40|opera
100|FireFox
5|no more trouble

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    He who asks will be a fool for five minutes, but he who doesn't ask will remain a fool for life.
    Chady | http://chady.net/
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