Solution to task 2

1 files changed, 72 insertions, 0 deletions

diff --git a/challenge-265/jo-37/perl/ch-2.pl b/challenge-265/jo-37/perl/ch-2.pl
new file mode 100755
index 0000000000..56929d721f
--- /dev/null
+++ b/challenge-265/jo-37/perl/ch-2.pl
@@ -0,0 +1,72 @@
+#!/usr/bin/perl -s
+
+use v5.24;
+use Test2::V0;
+use List::AllUtils qw(pairmap min_by count_by);
+use experimental 'signatures';
+
+our ($tests, $examples);
+
+run_tests() if $tests || $examples;	# does not return
+
+die <<EOS unless @ARGV;
+usage: $0 [-examples] [-tests] [TARGET WORD...]
+
+-examples
+    run the examples from the challenge
+ 
+-tests
+    run some tests
+
+TARGET
+    target string
+
+WORD...
+    list of words
+
+EOS
+
+
+### Input and Output
+
+say completing_word(@ARGV);
+
+
+### Implementation
+
+sub completing_word ($str, @str) {
+    my $target = qr{
+        ^
+        @{[
+            pairmap { '(?=' . ".*?$a" x $b . ')'}
+            count_by {$_}
+            lc($str) =~ /([[:alpha:]])/g
+        ]}
+        [[:alpha:]]*
+        $
+    }x;
+
+    min_by {length} grep {lc =~ /$target/} @str;
+}
+
+
+### Examples and tests
+
+sub run_tests {
+    SKIP: {
+        skip "examples" unless $examples;
+        is completing_word('aBc 11c' => 'accbbb', 'abc', 'abbc'),
+            'accbbb', 'example 1';
+        is completing_word('Da2 abc' => 'abcm', 'baacd', 'abaadc'),
+            'baacd', 'example 2';
+        is completing_word('JB 007' => 'jj', 'bb', 'bjb'),
+            'bjb', 'example 3';
+    }
+
+    SKIP: {
+        skip "tests" unless $tests;
+	}
+
+    done_testing;
+    exit;
+}