Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
I have a question or two on packing/unpacking/splitting/joining. I read a lot of messages on here already on packing and unpacking on how everyone else is having problems understanding it as well. Does anyone have a good analogy or scenario on why it's used and how it works?

I just wrote a script which encodes/decodes messages. It encoded perfectly while unpacking("C*".. Using the same method I tried to pack("C".. to decode it but it ran into a problem. It would only decode the first character, the others were deleted somehow. A perl monk told me I had to use split on packing and join on unpacking. This solved the problem, now the entire message can be encoded.

The user tried to explain why this had to be done but I didn't understand it in the least, can someone else try to help explain it? The only piece I got was the reason it didn't work was because my messages had spaces.

Thanks in advance for any and all help!

"Age is nothing more than an inaccurate number bestowed upon us at birth as just another means for others to judge and classify us"

sulfericacid

In reply to packing/unpacking/split/join confusion by sulfericacid

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!
  • 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, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others musing on the Monastery: (2)
    As of 2014-09-17 02:42 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      How do you remember the number of days in each month?











      Results (56 votes), past polls