Hi

the following example shows how to "ascii-draw" a tree with one regex! 



  DB<83> $_="x"x30


  DB<84> 1 while s/^( *x+)xx/ $1\n$&/;print "$_\n $1\n $1"
              xx
             xxxx
            xxxxxx
           xxxxxxxx
          xxxxxxxxxx
         xxxxxxxxxxxx
        xxxxxxxxxxxxxx
       xxxxxxxxxxxxxxxx
      xxxxxxxxxxxxxxxxxx
     xxxxxxxxxxxxxxxxxxxx
    xxxxxxxxxxxxxxxxxxxxxx
   xxxxxxxxxxxxxxxxxxxxxxxx
  xxxxxxxxxxxxxxxxxxxxxxxxxx
 xxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
              xx
              xx

[download]
That's for sure possible in a sole RegEx without while loop just with a /g-modifier!

But how? I experimented with \G but without success..

Cheers Rolf

PS: I know I missed Xmas... ; )

more golfing at Re: Christmas Tree

UPDATE: added 2 missing whitespaces

In reply to Resetting pos() within a RegEx? by LanX

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.