From 084417737a1ea1ddbd8b86a92f5ccb0e872095d4 Mon Sep 17 00:00:00 2001
From: Arne Sommer <arne@bbop.org>
Date: Sun, 24 Aug 2025 19:57:14 +0200
Subject: week 335 Arne Sommer

---
 challenge-335/arne-sommer/blog.txt               |  1 +
 challenge-335/arne-sommer/raku/ch-1.raku         | 13 +++++++
 challenge-335/arne-sommer/raku/ch-2.raku         | 45 ++++++++++++++++++++++++
 challenge-335/arne-sommer/raku/common-characters | 13 +++++++
 challenge-335/arne-sommer/raku/find-winner       | 45 ++++++++++++++++++++++++
 5 files changed, 117 insertions(+)
 create mode 100644 challenge-335/arne-sommer/blog.txt
 create mode 100755 challenge-335/arne-sommer/raku/ch-1.raku
 create mode 100755 challenge-335/arne-sommer/raku/ch-2.raku
 create mode 100755 challenge-335/arne-sommer/raku/common-characters
 create mode 100755 challenge-335/arne-sommer/raku/find-winner

diff --git a/challenge-335/arne-sommer/blog.txt b/challenge-335/arne-sommer/blog.txt
new file mode 100644
index 0000000000..b3f45a2085
--- /dev/null
+++ b/challenge-335/arne-sommer/blog.txt
@@ -0,0 +1 @@
+https://raku-musings.com/common-find.html
\ No newline at end of file
diff --git a/challenge-335/arne-sommer/raku/ch-1.raku b/challenge-335/arne-sommer/raku/ch-1.raku
new file mode 100755
index 0000000000..423b3fa202
--- /dev/null
+++ b/challenge-335/arne-sommer/raku/ch-1.raku
@@ -0,0 +1,13 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (*@words where @words.elems > 0, :v(:$verbose));
+
+my @bags  = @words>>.comb>>.Bag;
+
+say ": Bags; { @bags.raku }" if $verbose;
+
+my $intersection = [(&)] @bags;
+
+say ": Common: { $intersection.raku }" if $verbose;
+
+say "(" ~ $intersection.kxxv.sort.map( '"' ~ * ~ '"' ).join(", ") ~ ")";
\ No newline at end of file
diff --git a/challenge-335/arne-sommer/raku/ch-2.raku b/challenge-335/arne-sommer/raku/ch-2.raku
new file mode 100755
index 0000000000..7998fc654d
--- /dev/null
+++ b/challenge-335/arne-sommer/raku/ch-2.raku
@@ -0,0 +1,45 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (*@moves where @moves.elems > 0
+                 && all(@moves) ~~/^<[012]> \, <[012]>$/,
+               :v(:$verbose));
+
+my @board = [ [ '-', '-', '-' ], ['-', '-', '-'], ['-', '-', '-'] ];
+
+my $player = 'A';
+
+for @moves -> $move
+{
+  my ($x, $y) = $move.split(",");
+
+  die "Position $x,$y already taken" unless @board[$x][$y] eq "-";
+  
+  @board[$x][$y] = $player;
+
+  $player = $player eq 'A' ?? 'B' !! 'A'; 
+}
+
+if $verbose
+{
+  say ": " ~ @board[0].join(" ");
+  say ": " ~ @board[1].join(" ");
+  say ": " ~ @board[2].join(" ");
+}
+
+for 'A', 'B' -> $ab
+{
+  if all(@board[0;*]) eq $ab ||
+     all(@board[1;*]) eq $ab ||
+     all(@board[2;*]) eq $ab ||
+     all(@board[*;0]) eq $ab ||
+     all(@board[*;1]) eq $ab ||
+     all(@board[*;2]) eq $ab ||
+     @board[0][0] eq @board[1][1] eq @board[2][2] eq $ab ||
+     @board[2][0] eq @board[1][1] eq @board[0][2] eq $ab
+  {
+    say $ab;
+    exit;
+  }
+}
+
+say @moves.elems == 9 ?? 'Draw' !! 'Pending';
diff --git a/challenge-335/arne-sommer/raku/common-characters b/challenge-335/arne-sommer/raku/common-characters
new file mode 100755
index 0000000000..423b3fa202
--- /dev/null
+++ b/challenge-335/arne-sommer/raku/common-characters
@@ -0,0 +1,13 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (*@words where @words.elems > 0, :v(:$verbose));
+
+my @bags  = @words>>.comb>>.Bag;
+
+say ": Bags; { @bags.raku }" if $verbose;
+
+my $intersection = [(&)] @bags;
+
+say ": Common: { $intersection.raku }" if $verbose;
+
+say "(" ~ $intersection.kxxv.sort.map( '"' ~ * ~ '"' ).join(", ") ~ ")";
\ No newline at end of file
diff --git a/challenge-335/arne-sommer/raku/find-winner b/challenge-335/arne-sommer/raku/find-winner
new file mode 100755
index 0000000000..7998fc654d
--- /dev/null
+++ b/challenge-335/arne-sommer/raku/find-winner
@@ -0,0 +1,45 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (*@moves where @moves.elems > 0
+                 && all(@moves) ~~/^<[012]> \, <[012]>$/,
+               :v(:$verbose));
+
+my @board = [ [ '-', '-', '-' ], ['-', '-', '-'], ['-', '-', '-'] ];
+
+my $player = 'A';
+
+for @moves -> $move
+{
+  my ($x, $y) = $move.split(",");
+
+  die "Position $x,$y already taken" unless @board[$x][$y] eq "-";
+  
+  @board[$x][$y] = $player;
+
+  $player = $player eq 'A' ?? 'B' !! 'A'; 
+}
+
+if $verbose
+{
+  say ": " ~ @board[0].join(" ");
+  say ": " ~ @board[1].join(" ");
+  say ": " ~ @board[2].join(" ");
+}
+
+for 'A', 'B' -> $ab
+{
+  if all(@board[0;*]) eq $ab ||
+     all(@board[1;*]) eq $ab ||
+     all(@board[2;*]) eq $ab ||
+     all(@board[*;0]) eq $ab ||
+     all(@board[*;1]) eq $ab ||
+     all(@board[*;2]) eq $ab ||
+     @board[0][0] eq @board[1][1] eq @board[2][2] eq $ab ||
+     @board[2][0] eq @board[1][1] eq @board[0][2] eq $ab
+  {
+    say $ab;
+    exit;
+  }
+}
+
+say @moves.elems == 9 ?? 'Draw' !! 'Pending';
-- 
cgit