Matrix Slices

$ raku -MData::Dump -e 'my @foo = Array.new; for 0 .. 2 -> $i { for 0 .. 2 -> $j {  my $val = "i=$i AND  j=$j"; @foo[$i].push: $val } };  say Dump(@foo[1..2][1..2], :color(False))'
[
  [
    "i=2 AND  j=0".Str,
    "i=2 AND  j=1".Str,
    "i=2 AND  j=2".Str,
  ],
  (Nil),
]

$ raku -MData::Dump -e 'my @foo = Array.new; for 0 .. 2 -> $i { for 0 .. 2 -> $j {  my $val = "i=$i AND  j=$j"; @foo[$i].push: $val } };  say Dump(@foo[1..2;1..2], :color(False))'
[
  "i=1 AND  j=1".Str,
  "i=1 AND  j=2".Str,
  "i=2 AND  j=1".Str,
  "i=2 AND  j=2".Str,
]