Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation

Re: difficult error checking

by Sol-Invictus (Scribe)
on Jan 28, 2004 at 21:48 UTC ( #324796=note: print w/replies, xml ) Need Help??

in reply to difficult error checking

use a hash to filter doubles
#! perl -w use strict; my($file); my(%upload,%seen); %upload=(a=> 'dog', b=> 'cat', c=> 'llama', d => 'dog' ); for (keys %upload){ $file=$upload{$_}; if(defined $seen{$file}) { print "<center><font color=red>Duplicate filename found: $ +file</font></center>\n"; exit; } $seen{$file}=$file; print "<font color=blue><center>Uploaded $file</font></center>"; + }
Instead of the exit call you could just make the filename more unique by tagging on a number (much like your OS does when you make try to make a file with a non unique name)

#! perl -w use strict; my(%upload,%seen); my($counter,$file,$old); %upload=(a=> 'dog.gif', b=> 'cat.gif', c=> 'llama.gif', d => 'dog.gif' ); for (keys %upload){ $file=$upload{$_}; if(defined $seen{$file}) { $old=$file; while (defined $seen{$file}){ $file=$old; $counter++; $file=join('.',$file,$counter); } } $seen{$file}=$file; print "<font color=blue><center>Uploaded ",$file,"</font></cente +r>\n"; }

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://324796]
[marto]: This won't take till Summer to complete I hope ;)
[Discipulus]: i hope too, vacuum cleaner permitting, 2-3 afternoon to build. Or is the 1:1 serie? ;=)
[Tanktalus]: Sure, no one is active for hours and hours in the cb, so I go to upgrade the db, and then someone is active. Sheesh :)
[Discipulus]: anyway poppins probably died with the last night cold. But is not normal to see them in dec. they must pop in April
NodeReaper eyes the thorns in the side
Discipulus : the party puller!

How do I use this? | Other CB clients
Other Users?
Others drinking their drinks and smoking their pipes about the Monastery: (8)
As of 2017-12-18 21:33 GMT
Find Nodes?
    Voting Booth?
    What programming language do you hate the most?

    Results (498 votes). Check out past polls.