challenge 247, raku solutions

3 files changed, 37 insertions, 0 deletions

diff --git a/challenge-247/feng-chang/raku/ch-1.raku b/challenge-247/feng-chang/raku/ch-1.raku
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+++ b/challenge-247/feng-chang/raku/ch-1.raku
@@ -0,0 +1,11 @@
+#!/bin/env raku
+
+unit sub MAIN(*@people);
+
+my %plan;
+repeat {
+    %plan = @people Z=> @people.pick(*);
+} until %plan.map({ family-name(.key) ne family-name(.value) }).all;
+put "{.key.fmt('%-10s')} -> {.value}" for %plan;
+
+sub family-name(\name_) { name_.words.tail }
diff --git a/challenge-247/feng-chang/raku/ch-2.raku b/challenge-247/feng-chang/raku/ch-2.raku
new file mode 100755
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+++ b/challenge-247/feng-chang/raku/ch-2.raku
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+#!/bin/env raku
+
+unit sub MAIN(Str:D $s);
+
+my %count = $s.comb.rotor(2 => -1).map(-> (\A,\B){ A~B if B.ord == A.ord + 1 }).Bag;
+put %count.keys.sort({ -%count{$_}, $_ }).first;
diff --git a/challenge-247/feng-chang/raku/test.raku b/challenge-247/feng-chang/raku/test.raku
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+++ b/challenge-247/feng-chang/raku/test.raku
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+#!/bin/env raku
+
+# The Weekly Challenge 247
+use Test;
+
+sub pwc-test(Str:D $script, Bool :$deeply? = False, *@input) {
+    my ($expect, $assertion) = @input.splice(*-2, 2);
+    my $p = run $script, |@input, :out;
+    if $deeply {
+        is-deeply $p.out.slurp(:close).chomp.words.Bag, $expect, $assertion;
+    } else {
+        is $p.out.slurp(:close).chomp, $expect, $assertion;
+    }
+}
+
+# Task 2, Most Frequent Letter Pair
+pwc-test './ch-2.raku', 'abcdbca',           'bc', 'Most Frequent Letter Pair: abcdbca           => bc';
+pwc-test './ch-2.raku', 'cdeabeabfcdfabgcd', 'ab', 'Most Frequent Letter Pair: cdeabeabfcdfabgcd => ab';
+
+done-testing;