Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
If you run your code with perl -Dr (assuming your perl interpreter is compiled with debugging enabled), you'll see what I can see now too:

the regexp engine works and works and works...

However, I cannot see yet exactly what the solution is; at first sight, the regexp seems to be only extremely inefficient via the backtracks when it does _not_ find what it looks for.

Update.

A work-around to avoid the heavy backtracking when the wanted terms are not to be found in the wanted order might look like
if ($content =~ /$par2.*$par1/i) { if ($content =~ /\b($par2)(\W+(?:\w*\W*){1,$distance})?($par1) +\b/i){ warn "IF 2"; my ($par1, $par2, $par3) = ($1, $2, $3); $content =~ s/$par1\Q$par2\E$par3/<$tag$class> $par1<\/$ta +g>$par2<$tag$class> $par3<\/$tag>/gi; } }
That works for me, but I guess there should be some nicer solutions too.

Update2 Looks like using a regexp like
if ($content =~ /\b($par1)(\W+(\w+\W+){0,$distance})($par2)\b/i) {
works OK and also avoids the excessive backtracking for unsuccessful lookups. You'll have however to add an $4 and use it instead of $3 for the extra new match introduced with this.


In reply to Re^3: Problems searching and highlighting proximity words in a text by Krambambuli
in thread Problems searching and highlighting proximity words in a text by jrc

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!
  • 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
  • Outside of code tags, you may need to use entities for some characters:
            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?
    Username:
    Password:

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

    How do I use this? | Other CB clients
    Other Users?
    Others surveying the Monastery: (8)
    As of 2014-08-29 20:55 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      The best computer themed movie is:











      Results (289 votes), past polls