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

comment on

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

One problem with %HAS is that you have to duplicate the list of attributes.

# type them once... my %field1; my %field2; my %HAS; # type them twice... {$HAS{$_}=1} foreach qw(field1 field2);

As soon as you start typing field1, field2, etc. more than once you give yourself a problem when you change one and forget to change the other, etc.

For example, a typo in %HAS will foul up your new() method without any warnings, etc... and we suddenly start having some of the effects that we switched to inside-out-objects to avoid ;-)

There's also the fact that you don't want the user to fiddle with every attribute in your object.

This leads to the more general point that I don't think that a totally generic object construction subroutine is practical. What ever method you pick is going to be inappropriate/annoy one or more groups of people.

So - don't sweat it! Do something that works for the code that you're writing. Don't worry too much about the platonic one-true-new. There ain't no such beast :-)


In reply to Re^2: Beware can for attrs by adrianh
in thread (my?) problem with re-blessed references(?) by BrowserUk

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 wandering the Monastery: (5)
    As of 2020-10-26 10:25 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      My favourite web site is:












      Results (251 votes). Check out past polls.

      Notices?