I tried all of your snippets, and none seemed to work. For instance:

perl -le 'print join " ", map {ord pack "H2", $_} shift =~ /../g' 396

[download]

I'd expect to get: 0011 1001 0110, but instead I get 57, which isn't very binary at all :)

Similarly with decode: 

perl -le 'print unpack "H*", pack "C*", @ARGV' 0011 1001 0110

[download]

Results in 0be96e (hex!) instead of 396.

These should work: 

# encode
perl -e 'print sprintf("%04b ",$_) for shift =~ /\d/g' decimal

#decode
perl -e '$p=1; map{$l+=oct("0b$_")*$p;$p*=10} reverse @ARGV; print $l'
+ bcddigit1 bcddigit2 etc

[download]

Update: Updated decoder to use 5.6.1's oct("0b") feature instead of the old perlfaq way to convery binary to decimal.

In reply to Re: Encode and decode binary-coded decimals by jryan
in thread Encode and decode binary-coded decimals by jmcnamara

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.