FWIW: you might be able to use Bitwise String Operators to your benefit. (with different sub-strings of $A and counting the ` afterwards with tr )

But I have problems to match documentation with the behavior of 5.32

  DB<32> p "$A $B"
abbaba babbaaaa
  DB<33> no feature 'bitwise'; print 'abbaba' & 'babbaaaa'
``b``a
  DB<34> no feature 'bitwise'; print $A & $B
0
  DB<35> no feature 'bitwise'; print "$A" & "$B"
``b``a
  DB<36> print "$A" & "$B"
0
  DB<37>

[download]

looks like feature bitwise is now default w/o being explicitly explained in perlop

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

In reply to Re: Suffix-prefix matching done right by LanX
in thread Suffix-prefix matching done right by baxy77bax

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.