Beefy Boxes and Bandwidth Generously Provided by pair Networks
Clear questions and runnable code
get the best and fastest answer

Comment on

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

The fewer parameters that you pass to a subroutine, the easier it tends to be to maintain (assuming that everything is nicely encapsulated and you're not using globals or something like that). This is because the logic of dealing with one variable is typically going to be simpler than the logic of dealing with multiple variables. However, if I must pass numerous parameters, I like to set a threshhold of say, 4 parameters, and switch to a named argument style.

Consider the following, which is easy to happen when reusing a lot of code:

some_func( $foo, $bar, $baz, $qux ); # in another program some_func( $w, $x, $y, $z ); # yet another program some_func( $amount, $rate, $limit, $exception );

With this, not only are you forced to pass multiple parameters (even if they are undef), but you have to remember the order of the parameters. This can be awkward. Hmm... do I have the third and fourth parameters reversed, or not? However, what if $limit is optional, and I can't remember the order of $rate and $exception? With named parameters, this is a moot point:

some_func( exception => $exception, amount => $amount, rate => $rate );


Join the Perlmonks Setiathome Group or just click on the the link and check out our stats.

In reply to (Ovid) Re: Accessing Subroutine Arguments by Ovid
in thread Accessing Subroutine Arguments by vek

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 the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others imbibing at the Monastery: (7)
    As of 2015-11-25 05:43 GMT
    Find Nodes?
      Voting Booth?

      What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?

      Results (671 votes), past polls