Beefy Boxes and Bandwidth Generously Provided by pair Networks DiBona
Perl: the Markov chain saw
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
I think that you emphasized my point. As I said, To me both grep and map make me start looking for where the return is going because the return is likely to be the point of the operation. Your code example is:
my @minutes = map { $_ / 60 } @seconds;
I glance at this, and indeed the return is the point of the operation. Just the words, "minutes", "map", "60" and "seconds" makes it blindingly obvious.

However it is even more obvious because your code fits a visual pattern that I expect to see. Even a trivial code example with map or grep used for side-effects forces me to think. Compare

map {$_ /= 60 } @times;
vs
$_ /= 60 for @times;
Yeah, both are bad style. But of them, the latter is significantly easier for me to read, and not just because of length.

On an unrelated stylistic note, if the contents of a complex mapping become complex, rather than go to a foreach loop, I am inclined to write a function for the body of the map, name it well, and insert it into the map. This emphasizes that the operation is not simple, indicates what it is, and makes it clear that the point of the code is to return something. I find this clearer, YMMV.


In reply to Re: Re: Re: Re: Re: Think for yourself. by tilly
in thread is the use of map in a void context deprecated ? by arno

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!
  • 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
  • Outside of code tags, you may need to use entities for some characters:
            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 about the Monastery: (5)
    As of 2014-04-20 21:06 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      April first is:







      Results (487 votes), past polls