From c48f6fe33ea8b35ec2816fd0792b369ef5c073f6 Mon Sep 17 00:00:00 2001
From: Util <bruce.gray@acm.org>
Date: Sat, 29 Jun 2024 21:08:26 -0700
Subject: Add TWC 275 solutions by Bruce Gray, in Raku only.

---
 challenge-275/bruce-gray/raku/ch-1.raku | 18 ++++++++++++++++++
 challenge-275/bruce-gray/raku/ch-2.raku | 19 +++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 challenge-275/bruce-gray/raku/ch-1.raku
 create mode 100644 challenge-275/bruce-gray/raku/ch-2.raku

diff --git a/challenge-275/bruce-gray/raku/ch-1.raku b/challenge-275/bruce-gray/raku/ch-1.raku
new file mode 100644
index 0000000000..2131172a29
--- /dev/null
+++ b/challenge-275/bruce-gray/raku/ch-1.raku
@@ -0,0 +1,18 @@
+sub task1 ( @broken_keys, Str $sentence --> UInt ) {
+    my @w  = $sentence.lc.words;
+
+    my $bk = @broken_keys».lc.Set;
+
+    return +grep { !( .comb ∩ $bk ) }, @w;
+}
+
+
+use Test; plan +my @tests =
+    ( 0, 'la' , 'Perl Weekly Challenge' ),
+    ( 1, 'a'  , 'Perl and Raku' ),
+    ( 2, 'lo' , 'Well done Team PWC' ),
+    ( 2, 'T'  , 'The joys of polyglottism' ),
+;
+for @tests -> ( $expected, $in_keys, $in_sentence ) {
+    is task1($in_keys.comb, $in_sentence), $expected;
+}
diff --git a/challenge-275/bruce-gray/raku/ch-2.raku b/challenge-275/bruce-gray/raku/ch-2.raku
new file mode 100644
index 0000000000..89fc2cc6aa
--- /dev/null
+++ b/challenge-275/bruce-gray/raku/ch-2.raku
@@ -0,0 +1,19 @@
+sub task2 ( Str $s --> Str ) {
+    my $prior_char;
+
+    return [~] gather for $s.comb {
+        if /<.alpha>/ { take  $prior_char = $_ }
+        else          { take chr( $_ + $prior_char.ord ) }
+    }
+}
+
+
+use Test; plan +my @tests =
+    <a1c1e1 abcdef>,
+    <a1b2c3d4 abbdcfdh>,
+    <b2b bdb>,
+    <a16z abgz>,
+;
+for @tests -> ( $in, $expected ) {
+    is task2($in), $expected;
+}
-- 
cgit