So you say the confusing part is:
@A{keys %r} = keys %r;

[download]
as someone pointed out, its a hash slice, but when someone unfamiliar with it sees one, they usually wonder 'why is an @ in front of a hash array?'

Well, sort of the same reason you see '$' in front of an array or a hash when you're referring to one element of it, because in '$hash{name}' you're referring to a scalar element of the hash, and in '@hash{@array}' you're referring to an array of values. This one happens to be '@A{keys %r}', which still the same sort of thing since 'keys' returns an array.

So you're assigning an array of values to an array of elements, although the LHS happens to be an array of hash elements.

In reply to RE: strange looking code by runrig
in thread strange looking code by Jonathan

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.