Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling
 
PerlMonks  

Comment on

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

Not having encapsulation means that it's really, really easy for someone to silently and mysteriously break your class by overwriting a hash key. I've had to deal with this and it's not fun. For smaller systems, it's less of a problem but bigger systems require more careful planning. Admittedly good test suites catch the errors, but they frequently don't tell you how to fix 'em.

The main problem with inside-out objects is that they're currently even more of a hack than Perl's current OO system. With clean OO, we wouldn't even be worrying about this.

I might add that Class::BuildMethods does not override UNIVERSAL::DESTROY and is very lightweight. It gives you encapsulation in a very easy to use manner and can be incorporated into existing classes. Further, the constructor is usually ridiculously easy to use. It's much easier than its counter-parts. The trade-off being that you only get one style of getter/setter and you can only store a single value (hashes must be passed as hashrefs, for example. By restricting the interface, the code is simpler and faster. You want three simple getter/setters?

use Class::BuildMethods qw/name rank serial/;

You can mix them with any others you want and add defaults or validation as needed.

Cheers,
Ovid

New address of my CGI Course.


In reply to Re^2: Seeking inside-out object implementations by Ovid
in thread Seeking inside-out object implementations by xdg

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
  • 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?
    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 surveying the Monastery: (16)
    As of 2015-07-02 18:31 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









      Results (44 votes), past polls