But you might! The singleton class pattern isn't synonymous with static configuration. There are other uses for singletons.

I don't really mean singletons are only for configuration ! I just insist that singletons really are singletons; if you want a variation of a singleton locally in your program, that simply means you shouldn't be using a singleton in the first place.

Tell me how do singleton's break encapsulation any more/less than a set of package variables? If you're using them to return static configuration information (as you seem to be proposing) then they encapsulate exactly the same thing.

As I understand it accessing any variable inside another package directly is EVIL :) When using a singleton, you ask the object to provide you with the data (thru a getter/setter or whatever mecanism you're using, anything BUT direct access), you don't simply take it. That's the difference between breaking or not breaking encapsulation.


In reply to Re^13: what is a propper way to make a chunk of data accessible to all my packages for retrieval and modification ? by wazoox
in thread what is a propper way to make a chunk of data accessible to all my packages for retrieval and modification ? by leocharre

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.