There Is More Than One Way To Do It.

But how would you do this? 

sub Counter ($) {
    local $/ = "\n";
    my             $fh;
    open           $fh, '+<', $_[0] or
    open           $fh, '>',  $_[0] or return undef;
    flock          $fh, 2;
    seek           $fh, 0, 0;
    my $counter = <$fh>;
    seek           $fh, 0, 0;
    truncate       $fh, 0;
    print          $fh ++$counter   or return undef;
    close          $fh              or return undef;
    return $counter;
}

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How many ways can we find to re-write this? I'd like to see radical changes (modules, OO, maybe even an implementation using Inline::C?), not some small syntax adjustments, so please don't focus on $_[0] versus assigning @_ to something, or on the prototype.

Error checking, file locking and doing all in one open is optional. Bonus points for those who do, though :) 

- Yes, I reinvent wheels.
- Spam: Visit eurotraQ.

In reply to TIMTOWTDI - a counter by Juerd

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