FYI, the following all accomplish the same:
if (($bytetocheck >> $bittocheck) & 1)
if ($bytetocheck & (1 << $bittocheck))
if ($bytetocheck & $bit[$bittocheck])
if (vec($bytetocheck, $bittocheck, 1))

And in the interest of eliminating redundancy, 

   if (($bytetocheck >> $bittocheck) & 1) {
      return 1;
   } else {
      return 0;
   }

[download]

simplifies to any of the following:
return (($bytetocheck >> $bittocheck) & 1);
return ($bytetocheck & (1 << $bittocheck)) ? 1 : 0;
return ($bytetocheck & $bit[$bittocheck]) ? 1 : 0;
return vec($bytetocheck, $bittocheck, 1);

and the following, if you're only interested in returning a boolean value:
return ($bytetocheck & (1 << $bittocheck));
return ($bytetocheck & $bit[$bittocheck]);

In reply to Re^2: Help comparing data in byte by shifting (>>) bits by ikegami
in thread Help comparing data in byte by shifting (>>) bits by unixhome

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.