From bd74d28150c9aedc46984dd57d5daeef7349e174 Mon Sep 17 00:00:00 2001
From: Luca Ferrari <fluca1978@gmail.com>
Date: Mon, 25 Apr 2022 19:23:30 +0200
Subject: Partial solution 2

---
 challenge-162/luca-ferrari/raku/ch-2.p6 | 96 +++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100755 challenge-162/luca-ferrari/raku/ch-2.p6

diff --git a/challenge-162/luca-ferrari/raku/ch-2.p6 b/challenge-162/luca-ferrari/raku/ch-2.p6
new file mode 100755
index 0000000000..d3e3e6e2fe
--- /dev/null
+++ b/challenge-162/luca-ferrari/raku/ch-2.p6
@@ -0,0 +1,96 @@
+#!raku
+
+sub build-grid( Str $passprhase ) {
+    my @grid;
+    my $counter = 0;
+    for $passprhase.comb {
+        # skip existing letters
+        next if @grid.grep( $_ );
+        next if $_ !~~ / <[ a .. z ]> /;
+
+        # insert this letter
+        @grid.push: $_;
+        @grid.push: '|' if ++$counter %% 5;
+    }
+
+    # add the other letters
+    unless ( @grid.grep( '|' ).elems == 5 ) {
+        for 'a' .. 'z' {
+            next if @grid.grep( $_ );
+            next if $_ ~~ / i /;
+            next if $_ ~~ / j /;
+
+            # insert this letter
+            @grid.push: $_;
+            @grid.push: '|' if ++$counter %% 5;
+            last if @grid.grep( '|' ).elems == 5;
+        }
+    }
+
+    # now split the array into a matrix
+    my @matrix;
+    for @grid.join.split( '|' ) {
+        next if ! $_;
+        @matrix.push: [ $_.comb ];
+    }
+
+    say @matrix;
+    return @matrix;
+}
+
+
+sub build-pairs( Str $needle ) {
+
+    my @mangled;
+    my @current;
+    for $needle.comb {
+        next if $_ ~~ / ' ' /;
+
+        @current.push: $_  if ! @mangled.grep( $_ );
+        @current.push: 'X' if   @mangled.grep( $_ );
+
+        if @current.elems == 2 {
+            @mangled.push: [@current];
+            @current = ();
+        }
+    }
+
+    return @mangled;
+}
+
+
+sub MAIN() {
+    my @key-matrix = build-grid( 'playfair example' );
+    my @pairs = build-pairs( 'hide the gold in the tree stump' );
+
+
+    for @pairs -> @current-pair {
+        my @rectangle;
+
+        for 0 ..^ @current-pair {
+            my $current_letter = @current-pair[ $_ ];
+            my $found = False;
+
+            for 0 ..^ @key-matrix.elems -> $row {
+                for 0 ..^ 5 -> $column {
+                    if @key-matrix[ $row ][ $column ] ~~ $current_letter {
+                        # found!
+                        @rectangle.push: ( row => $row, col => $column ).Hash;
+                        $found = True;
+                    }
+
+                    last if $found;
+                }
+
+                last if $found;
+            }
+        }
+
+        say @current-pair.join;
+        say @rectangle;
+
+        say @rectangle[ 0 ].^name;
+#        my $is-rectangle = @rectangle[ 0 ]{ row } != @rectangle[ 1 ]{ row } && @rectangle[ 0 ]{ col } != @rectangle[ 1 ]{ col };
+#       say "rettangolo $is-rectangle";
+    }
+}
-- 
cgit