Beefy Boxes and Bandwidth Generously Provided by pair Networks
Pathologically Eclectic Rubbish Lister

Comment on

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

This just came up again on use Perl (and again). I see four large factions here:

  1. List functions

    Things that take a list and return a list in list context and return a count of items in scalar context. The sole notable exception is sort.

  2. Iterators

    Things that take a scalar and return a list in list context tend to return a scalar in scalar context, and you can call them with the same input scalar to get the next element of what would have been a list in list context.

  3. Literal list operators

    Things that construct a list and give it to you in list context but only its last element in scalar context.

  4. “I’m chatty in list context”

    Things that can provide a bunch of information, which you get all of in list context, and the first first bit of in scalar context.

The rest is a tiny inconsistent minority.

The hash-related functions kind of belong to the list functions and kind of to the iterators – particularly the oddball each, which is the only thing that functions as an iterator in both contexts. But that is because hashes are kind of oddball anyway in terms of context.

So the return values are consistent, their consistency is just inconsistent.

Makeshifts last the longest.

In reply to Re: On Scalar Context by Aristotle
in thread On Scalar Context by merlyn

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: (2)
    As of 2015-11-28 22:11 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 (746 votes), past polls