use Perl

• POSIX character class? (Score:2)

  by djberg96 (2603)

  I sat in a Perl Script Security talk, noting that /^[a-z]+$/ on the slides would erroneously match foo\n

  Is using [:lower:] the appropriate approach? Just curious.
  • Re:POSIX character class? (Score:1)

    by gav (2710)

    The correct thing is to use \z:

    $_ = "blah\n";
    print "dollar\n" if /^[a-z]+$/;
    print "z\n" if /^[a-z]+\z/;
    __END__
    dollar

    I don't quite like the \a or \z modifiers. They seem a bit funky to me.

    I tend to solve this problem by getting rid of leading and trailing whitespace with something like:

    my %params = map { $_ => trim($cgi->param($_)) } qw(var_a var_b var_c);
    
    sub trim {
      my $str = shift;
      if ($str) {
         $str =~ s/^\s+//;
         $str =~ s/\s+$//;
      }
      $st
    • Re:POSIX character class? (Score:3, Informative)

      by TorgoX (1933)

      \a is alarm. You mean \A. Yet another problem with the whole mess!
• s/Stonehenge/OSCON LAN Party/ (Score:2)

  by cwest (1514)

  It just wouldn't be the Open Source way to take all the thunder when you produce such little lightning.
  
  IOW, it was not the Stonehenge Party. This year, my party swallowed the Stonehenge Party. I'm glad people liked it enough to see it next year, I suppose I'll just have to do it again.
  

  --
  Casey West
  • Re:s/Stonehenge/OSCON LAN Party/ (Score:1)

    by merlyn (47)

    I said:

    It was cool that someone wanted to institutionalize the Stonehenge party.

    That's not a dig at the party that actually happened. I was merely quoting what I heard in the room. I know it was our party.

    --
    

    • Randal L. Schwartz
    • Stonehenge
• 3 argument open (Score:1)

  by bart (450)

  you can't use the open FOO, "< $bar\0" trick unless you've also preprocessed $bar with an initial ./ if it needs it. Ugh.

  The proper thing to do is of course to use the three argument open(), which was new in 5.6. No parsing of the file name there. sysopen() would work too, but is much clumsier.