OK, flaw in my logic there - which you could have simply pointed out without the challenge to a bet. Hope you feel superior now.

The point of my original post is that there may be a sufficiently simple way of doing it, without resorting to databases or with the caveats associated with random numbers and hashing.

Maybe the Time::HiRes module would be an option - microsecond resolution, if available, should be enough:

use strict;
use warnings;
use Time::HiRes qw(gettimeofday);

my($seconds, $microseconds);
my $index;

for (1..10) {
   ($seconds, $microseconds) = gettimeofday;
   $index = sprintf("%d%06d", $seconds, $microseconds);
   print "$index\n";
}

[download]

Output:

1290951829553400
1290951829553437
1290951829553448
1290951829553457
1290951829553467
1290951829553477
1290951829553487
1290951829553496
1290951829553505
1290951829553515

[download]

In reply to Re^3: Renaming an image file by mjscott2702
in thread Renaming an image file by Anonymous Monk

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