Not necessarily recommended for an interview response, but gives a rare opportunity to employ List::MoreUtils::part(): 

c:\@Work\Perl>perl -wMstrict -le
"use Test::More 'no_plan';
 use Test::NoWarnings;
 ;;
 use List::MoreUtils qw(part);
 ;;
 sub ascending_runs {
   my $prev = $_[0];
   my $i = 0;
   return part { ++$i if $_ < $prev;  $prev = $_;  $i; } @_;
   };
 ;;
 VECTOR:
 for my $ar_vector (
   [ [ 1..8,     3, 5, 6,     3, 8,     1, 7, 8 ],
     [ 1..8 ], [ 3, 5, 6 ], [ 3, 8 ], [ 1, 7, 8 ],
     ],
   [ [], ],
   [ [ 0 ], [ 0 ] ],   [ [ 1 ], [ 1 ] ],  [ [ -7 ], [ -7 ] ],
   [ [ 0, 7 ], [ 0, 7 ] ],  [ [ 7, 0 ], [ 7 ], [ 0 ] ],
   [ [ -1, 0], [ -1, 0 ] ],  [ [ 0, -1 ], [ 0 ], [ -1 ] ],
   ) {
   my ($ar_in, @expected) = @$ar_vector;
   is_deeply [ ascending_runs(@$ar_in) ], \@expected;
   }
"
ok 1
ok 2
ok 3
ok 4
ok 5
ok 6
ok 7
ok 8
ok 9
ok 10 - no warnings
1..10

[download]

In reply to Re: Spliting array into nested sequential arrays by AnomalousMonk
in thread Spliting array into nested sequential arrays by Hameed

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.