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