Here's an implementation of the suggestion I made in my reply to Corion... 

#!/usr/bin/perl -w
use strict;

use Tie::File;
use List::Util qw( shuffle );

tie my @file, 'Tie::File', $ARGV[0] or die "$ARGV[0]: $!";

print $file[$_], "\n" for shuffle 0 .. $#file;

[download]
Short and sweet. :-) 

-sauoq
"My two cents aren't worth a dime.";

In reply to Re: Randomize lines with limited memory by sauoq
in thread Randomize lines with limited memory by natch

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