@$self->{ITEMS}
@$x->{y}

[download]

$self->{ITEMS} (or $x->{y}) returns a reference or pointer to an array of values. The @-operator dereferences it to be used by the map and grep functions.

This could have been much more clearly written as:

@{ $x->{y} }

But if wishes were fishes... :) My point is that there's nothing magical about this, and doesn't really require an "examination."

Hope this helps, or at least makes sense with all that chaos out there.

Alakaboo
I am the lurker that spams in the night.

(UPDATE: I understand what chip is saying, and I'm not trying to be a smartass. I think he's reading into the code a little too deeply. Just wanted to clarify things for some of the less experienced readers. :P)

In reply to RE: RE: A minor epiphany with grep and map by mwp
in thread A minor epiphany with grep and map by ase

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.