Beefy Boxes and Bandwidth Generously Provided by pair Networks
We don't bite newbies here... much

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
"Considered Harmful" Essays Considered Harmful ;-)

Seriously, there's something I find questionable. You show how chained mutators can be abused and dangerous, and the solution is "please don't" write the mutators to support this usage (unless I misunderstood and the "please don't" only applied to doing the chaining, rather that writing the mutator that way). Going back to the famous "goto considered harmful essay", that would be like saying that, since goto can be abused, languages shouldn't have a goto. While this is a nice purist position to take, decades after the essay many real-life, pragmatic language designers include goto anyway and leave the responsibility of using it wisely (if needed) to the user. I choose to do the same: I allow the mutators I write to be chained, even if in practice I only chain them in limited cases where they are really clear (in my opionion).

Of course, if you really want to return an error code from your mutators, please go ahead and be consistent. I think returning the value that was set is useless, as others have said in this thread. But if the choice is between an undefined return value and returning $self, why not return $self and let the user do whatever he or she wants with it?

In reply to Re: Mutator chaining considered harmful by itub
in thread Mutator chaining considered harmful by Aristotle

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?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others taking refuge in the Monastery: (5)
    As of 2018-04-24 13:38 GMT
    Find Nodes?
      Voting Booth?