Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl-Sensitive Sunglasses
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
If we later decide to change the implementation of our list to a hash our loop will also process the hash keys (this would most likely not be what we want). We have to change code outside our object to conform with the new internal data structure of the object.

No, you just need to change your accessor so that it returns the values instead of the whole hash. You incur the cost of building an array where you could just return a premade one before, but it's dangerous to return references to your internal data structures anyway (you lose control of what's in them). Being able to make this kind of change is most of the argument behind using accessors instead of data members in the first place.

I agree that accessors can be misused, but I'm a little worried that people are going to interpret your advice as meaning that you should always use an iterator or visitor pattern instead of returning an array. In perl, that's not necessary.


In reply to Re: Why get() and set() accessor methods are evil by Anonymous Monk
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 imbibing at the Monastery: (2)
    As of 2021-01-23 09:25 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      Notices?