I've recently switched over to using naked returns and hit this problem.

A method '$park->has_dinosaurs' returns a boolean. Another subroutine, 'stop' passes its arguments as an anonymous hashref. 
stop( { name            => $name,
        stop_dinosaurs  => $park->has_dinosaurs,
        timeout_seconds => $config{stop_timeout}, } );

[download]
'has_dinosaurs' was written according to PBP, and therefore returns either '1' or the default value of return.

When 'has_dinosaurs' returns false (nothing), the 'stop' call produces a runtime warning "Odd number of elements in anonymous hash", and then a runtime error inside &stop, because 'timeout_seconds' wasn't defined. The placement inside an anonymous hash seems to force array context (which seems a little odd). Call context checking inside has_dinosaurs won't help, without also breaking exactly what PBP 9.12 is supposed to prevent. What do people suggest?


- Boldra

In reply to return explicit undef - Best Practices? by Boldra

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.