Since you're searching for a constant string, index is faster than a regexp:

foreach my $elem (@repos) {
   my $repo_name = $elem;

   my $pos = index(lc($repo_name), lc($svnroot));

   if ($pos >= 0) {
      substr($repo_name, $pos, length($svnroot), '');
   }

   print("$repo_name\n");
}

[download]

Or since you probably meant to search for /^\Q$svnroot\E/ (i.e. search for $svnroot at the beginning of the string), this is more precise and even faster:

foreach my $elem (@repos) {
   if (lc($svnroot) eq substr(lc($elem), 0, length($svnroot))) {
      print(substr($elem, length($svnroot)), "\n");
   } else {
      print("$elem\n");
   }
}

[download]

In reply to Re: search and replace frustration by ikegami
in thread search and replace frustration by gheard

Title:
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, details, 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, summary, 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.