The point about the advantages of local *_ = \ $array[$i]; is well taken, but I absolutely hate for(;;) loops. It seems like I've made a fencepost error almost every time I wrote one of those. There are very few cases where it's the most appropriate solution. Since for(;;) is implemented in terms of while(){} continue{}, you should use while(){} unless you actually need a very simple continue{} block (and I've never come across such a case). For abitrarily complex index calculation I'd do something like this: 
my $get_next_idx = make_index_iterator(\@array);

while(my $i = $get_next_idx->()) {
    local *_ = \ $array[$i];
    # $_ is aliased here
}

[download]
(Note how the point about ($_) for BrowserUk's code doesn't apply as $i is an array index, not an array element.)

Makeshifts last the longest.

In reply to Re^2: Starting foreach at an arbitrary position by Aristotle
in thread Starting foreach at an arbitrary position by Anonymous Monk

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.