Beefy Boxes and Bandwidth Generously Provided by pair Networks
Your skill will accomplish
what the force of many cannot
 
PerlMonks  

comment on

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

Hello synistar

Months ago I wrote a meditation on the involuntary encapsulation violation; even if I had three nice answers, I still think that that kind of implicit ability of modifying the internals of an object without using accessors is a bad thing. What I think is wrong in an accessor like get_list is that you are passing back to the caller a reference to an internal structure of the object. Do something like this:

my $x = $obj->get_list ; $x->[3] = 'surprise!' ;

...et voilà!: you changed the object without using set_list. I agree that the example above is really-bad-code, but there is a lot of it around...

Strictly speaking about your meditation, I like best accessors that have the ability to get/set their values, or read-only ones, or write-only ones. After reading Advanced Perl Programming I started using get/set methods, but after a short time I found them really annoying...

Ciao!
--bronto


The very nature of Perl to be like natural language--inconsistant and full of dwim and special cases--makes it impossible to know it all without simply memorizing the documentation (which is not complete or totally correct anyway).
--John M. Dlugosz

In reply to Re: Why get() and set() accessor methods are evil by bronto
in thread Why get() and set() accessor methods are evil by synistar

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, 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 drinking their drinks and smoking their pipes about the Monastery: (6)
    As of 2021-01-23 08:35 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      Notices?