Beefy Boxes and Bandwidth Generously Provided by pair Networks
Don't ask to ask, just ask

comment on

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

I find the return value of a hash in a scalar context odd.
$ perl -le '%h = (a =>1, b => 2); print scalar %h' 2/8
From perldata:
If you evaluate a hash in scalar context ... the value returned is a string consisting of the number of used buckets and the number of allocated buckets ...


I can't imagine that this is useful to anyone except the implementor of the hashing function and the occasional person with pathological data.

It would be much more useful, or sensible, if hash in a scalar context returned the number of keys:

$ perl -le '%h = (a =>1, b => 2); print scalar keys %h' 2

And before anyone leaps to the defense of this artifact I'm just stating that I find it odd. I can live with it.

I think that there were a lot of things that I used to find odd but since I can't remember what they are I guess that I've just come to accept them. :-)


In reply to Re: Perl oddities by jmcnamara
in thread Perl oddities by brian_d_foy

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 exploiting the Monastery: (5)
    As of 2019-12-09 07:02 GMT
    Find Nodes?
      Voting Booth?

      No recent polls found