Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
To me, this looks like a dodgy cargo cult way of doing an ordered hash.

It is neither dogdy; nor cargo-cult; nor do they pre-date hashes. Both became available at exactly the same time with the advent of blessed references circa. 5.001.

The code is using a blessed array rather than a blessed hash as the basis of its objects. This is more compact and faster than the "normal" blessed hashes.

The constants give programmer-friendly names to the fields; whilst still allowing the field lookups to be optimally efficient.

For completeness, field lookup with a hash still requires an array lookup; but first the key (field name) has to be translated into an index number. And then, if you happen to be unlucky, there might need to be a linear search as well.

blessed arrays with named constant field indexes are a less used, but perfectly valid, highly functional and more efficient way of implementing objects in Perl.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re: Is this ancient perl or just a cargo cult? by BrowserUk
in thread Is this ancient perl or just a cargo cult? by nevdka

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, 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 rifling through the Monastery: (3)
    As of 2015-11-28 00:27 GMT
    Find Nodes?
      Voting Booth?

      What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?

      Results (735 votes), past polls