Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??

It may not be necessary, if your data is reliable enough that you know there will always be the same number of values in the same order for each key. But I still like the hash-of-hashes because it tends to be easier to remember key names than index numbers. For instance, which of these makes it easier to recognize what it contains?

$hash{key}{ip_address}; # or $hash{key}[1];

On the other hand, arrays are faster and use less memory than hashes, so if you're pressed for speed or resources, a hash-of-arrays may be the better solution.

Aaron B.
My Woefully Neglected Blog, where I occasionally mention Perl.

In reply to Re^3: Assign 2D-Arrays to a hash using a key by aaron_baugher
in thread Assign 2D-Arrays to a hash using a key by mmartin

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
  • 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.
  • Log In?

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

    How do I use this? | Other CB clients
    Other Users?
    Others cooling their heels in the Monastery: (7)
    As of 2015-10-08 17:19 GMT
    Find Nodes?
      Voting Booth?

      Does Humor Belong in Programming?

      Results (222 votes), past polls