Hi monks,

I'm wondering if there's any good way to retreave values from an array in pairs. Here's what I got: 
sub foo {
    while (@_) {
        my $var = shift;
        my $val = shift;
        print "var = $var; val = $val\n";
    }
}

my @array = (a=>1, b=>2, c=>3);
foo(@array);

[download]


This code certainly works, but I'd like to do away with the two shift() calls. My question really is, why wouldn't this work (reports an error): 
my ($var, $val);
for (($var, $val) = each %{@_}) {
    print "var = $var; val = $val\n";
}

[download]

The error I get says: 
Bizarre copy of ARRAY in leave at arrays.pl line 14, <IN> chunk 5.

[download]

It doesn't really matter to me which way to go (about implementing this) but, what does that error mean? I might be missing something simple and evident ;-).

sorry for bugging ya for such little thing ;).

"There is no system but GNU, and Linux is one of its kernels." -- Confession of Faith

In reply to Getting pair of values from an array by vladb

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.