Beefy Boxes and Bandwidth Generously Provided by pair Networks
Don't ask to ask, just ask

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
If the 'undefined' warning bothers you you can fix it by making sure $tmp2 is always defined. This works wonders:
my $tmp2 = ""; $tmp2 = $2;
...which gives you the added bonus of scoping $tmp2. Plus, you don't have to check whether a character is present in your var before substituting it out.
if($tmp2 =~ m/\'/) { $tmp2 =~ s/\'/\\\'/g; # escape the single quotes.. }
is better written as:
$tmp2 =~ s/'/\\'/g; # escape the single quotes..
If there's a single quote in $tmp2 it'll get escaped. Otherwise nothing happens. Note that you don't have to escape single-quotes within a regex.

Lastly if you're paranoid about non-Alphanumerics in your regex's check out the \Q modifier. This does what you want automatically within a regular expression without you having to do anything else.

Gary Blackburn
Trained Killer

Edited:Added my $tmp2=""; to really make $tmp2 defined. :-P

In reply to Re: Use of uninitialized value in pattern match (m//) by Trimbach
in thread Use of uninitialized value in pattern match (m//) by wolis

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others imbibing at the Monastery: (5)
    As of 2020-11-24 17:19 GMT
    Find Nodes?
      Voting Booth?

      No recent polls found