Dear monks,
let's set so double the killer delete select all.

Sorry. I'll try that again.

I am parsing binary data with unpack. The binary data consists of segments of six bytes. There are hundreds of such six-byte datums stored in a single binary string.

The binary data looks something like this:

my $data = pack("H*", "0000230ebb0000002b0ece000000330ee200");

I can do unpack("(CCSS)*", $data); and it will output an array like: [0,0,3619,187,0,0,3627,206,0,0,3635,226]

However, I would like it to output an array like: [[0,0,3619,187],[0,0,3627,206],[0,0,3635,226]]

i.e. so that each of the six-byte segments form an arrayref of their own.

I read the venerable node 539664 but was none the wiser.

Can unpack() do this or do I need to just loop over the string with substr() and unpack one segment at a time?

I hope this question was clear enough; it's been a long time since I've asked anything.


In reply to unpack into arrayrefs? by Anonymous Monk

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.