1 files changed, 70 insertions, 0 deletions
diff --git a/challenge-275/jo-37/perl/ch-1.pl b/challenge-275/jo-37/perl/ch-1.pl
new file mode 100755
index 0000000000..bc127d9e4d
--- /dev/null
+++ b/challenge-275/jo-37/perl/ch-1.pl
@@ -0,0 +1,70 @@
+#!/usr/bin/perl -s
+
+use v5.26;
+use Test2::V0;
+
+our ($tests, $examples, $verbose, $broken);
+
+run_tests() if $tests || $examples;	# does not return
+
+die <<EOS unless $broken =~ /\w+/ && @ARGV;
+usage: $0 [-examples] [-tests] [-verbose] [-broken=BROKEN] [WORD...]
+
+-examples
+    run the examples from the challenge
+ 
+-tests
+    run some tests
+
+-verbose
+    print typeable words instead of counting them
+
+-broken=BROKEN
+    string of broken keys
+
+WORD...
+    list of words
+
+EOS
+
+
+### Input and Output
+
+main: {
+    my @typeable = broken_keys([split //, $broken], "@ARGV");
+    say $verbose ? "@typeable" : scalar @typeable;
+}
+
+
+### Implementation
+#
+# For details see:
+# https://github.sommrey.de/the-bears-den/2024/06/28/ch-275.html#task-1
+
+
+sub broken_keys {
+    my $typeable = qr{^[^@{+shift}]+$}ixx;
+
+    grep /$typeable/, split /\s+/, shift;
+}
+
+
+### Examples and tests
+
+sub run_tests {
+    SKIP: {
+        skip "examples" unless $examples;
+
+        is scalar broken_keys(['l', 'a'], 'Perl Weekly Challenge'), 0, 'example 1';
+        is scalar broken_keys(['a'], 'Perl and Raku'), 1, 'example 2';
+        is scalar broken_keys(['l', 'o'], 'Well done Team PWC'), 2, 'example 3';
+        is scalar broken_keys(['T'], 'The joys of polyglottism'), 2, 'example 4';
+    }
+
+    SKIP: {
+        skip "tests" unless $tests;
+	}
+
+    done_testing;
+    exit;
+}