From b87e9a24dd5b7e904babc5626f4874040cf58503 Mon Sep 17 00:00:00 2001
From: Util <bruce.gray@acm.org>
Date: Sun, 29 Oct 2023 15:56:59 -0500
Subject: Add TWC 240 solutions by Bruce Gray (Raku only).

---
 challenge-240/bruce-gray/raku/ch-1.raku | 48 +++++++++++++++++++++++++++++++++
 challenge-240/bruce-gray/raku/ch-2.raku | 20 ++++++++++++++
 2 files changed, 68 insertions(+)
 create mode 100644 challenge-240/bruce-gray/raku/ch-1.raku
 create mode 100644 challenge-240/bruce-gray/raku/ch-2.raku

diff --git a/challenge-240/bruce-gray/raku/ch-1.raku b/challenge-240/bruce-gray/raku/ch-1.raku
new file mode 100644
index 0000000000..d94869d6f0
--- /dev/null
+++ b/challenge-240/bruce-gray/raku/ch-1.raku
@@ -0,0 +1,48 @@
+# Three solutions:
+# Extract first letters of words, and join those letters, compare with FoldCase (.fc) .
+# Use .starts-with to check each letter of the acronym against each word.
+# Construct regex to match against the stringifiled list of words iff proper acronym.
+
+my sub first_letters ( @s --> Str ) { @s».substr(0, 1).join }
+
+sub task1_first_letters ( Str $acronym, @words --> Bool ) {
+    return $acronym.fc eq @words.&first_letters.fc;
+}
+
+
+# Used `Zsw` with size guard instead of `»sw«` to keep from throwing error.
+my sub infix:«sw» { $^a.starts-with: $^b, :ignorecase }
+
+sub task1_starts_with ( Str $acronym, @words --> Bool ) {
+    return False if $acronym.chars != @words.elems;
+
+    return ?all @words».fc Zsw $acronym.comb».fc;
+}
+
+
+sub task1_regex ( Str $acronym, @words --> Bool ) {
+    warn if @words.any ~~ /\s/;
+
+    my $re = $acronym.comb.map( * ~ '\S*' ).join('\s+');
+
+    return so @words.Str ~~ m:i/ ^ <$re> $ /;
+}
+
+
+constant @tests =
+    ( True  , ( 'ppp' , <Perl Python Pascal> ) ),
+    ( False , ( 'rp'  , <Perl Raku>          ) ),
+    ( True  , ( 'oac' , <Oracle Awk C>       ) ),
+;
+constant @subs =
+    :&task1_first_letters,
+    :&task1_starts_with,
+    :&task1_regex,
+;
+use Test; plan @tests * @subs;
+for @subs -> ( :key($sub_name), :value(&task1) ) {
+    for @tests -> ( Bool $expected, ( Str $acro, @words ) ) {
+        is task1($acro, @words), $expected,
+            "{$sub_name.fmt("%19s")} : $acro, @words[]";
+    }
+}
diff --git a/challenge-240/bruce-gray/raku/ch-2.raku b/challenge-240/bruce-gray/raku/ch-2.raku
new file mode 100644
index 0000000000..8261345f1a
--- /dev/null
+++ b/challenge-240/bruce-gray/raku/ch-2.raku
@@ -0,0 +1,20 @@
+sub task2 ( Int @ns --> List ) {
+
+    # if @ns.grep( * !~~ 0..@ns.end ) -> @bad {
+    #     warn "These values are outside the range of possible keys, and so will be undefined: @bad[]";
+    # }
+
+    return @ns[ @ns ];
+}
+
+
+constant @tests =
+    ( (0, 2, 1, 5, 3, 4), (0, 1, 2, 4, 5, 3) ),
+    ( (5, 0, 1, 2, 3, 4), (4, 5, 0, 1, 2, 3) ),
+
+    # ( (5, 0, 1, 2, 3, 9), (9, 5, 0, 1, 2, Int) ), # Should warn. No time this week to implement testing of warnings.
+;
+use Test; plan +@tests;
+for @tests -> ( @in, @expected ) {
+    is-deeply task2(Array[Int].new(@in)), @expected;
+}
-- 
cgit