challenge 246, raku solutions

3 files changed, 32 insertions, 0 deletions

diff --git a/challenge-246/feng-chang/raku/ch-1.raku b/challenge-246/feng-chang/raku/ch-1.raku
new file mode 100755
index 0000000000..6e18559070
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+++ b/challenge-246/feng-chang/raku/ch-1.raku
@@ -0,0 +1,3 @@
+#!/bin/env raku
+
+.put for (1..49).pick(6);
diff --git a/challenge-246/feng-chang/raku/ch-2.raku b/challenge-246/feng-chang/raku/ch-2.raku
new file mode 100755
index 0000000000..90fef1869d
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+++ b/challenge-246/feng-chang/raku/ch-2.raku
@@ -0,0 +1,8 @@
+#!/bin/env raku
+
+unit sub MAIN(*@ints where +* == 5);
+
+my Rat \m = (@ints[2]² - @ints[1] * @ints[3]) / (@ints[0] * @ints[2] - @ints[1]²);
+my Rat \q = (@ints[0] * @ints[3] - @ints[1] * @ints[2]) / (@ints[0] * @ints[2] - @ints[1]²);
+
+put m.Int == m && q.Int == q && @ints[4] == m * @ints[2] + q * @ints[3];
diff --git a/challenge-246/feng-chang/raku/test.raku b/challenge-246/feng-chang/raku/test.raku
new file mode 100755
index 0000000000..961095cb1a
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+++ b/challenge-246/feng-chang/raku/test.raku
@@ -0,0 +1,21 @@
+#!/bin/env raku
+
+# The Weekly Challenge 246
+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, Linear Recurrence of Second Order
+pwc-test './ch-2.raku', |<1 1 2 3 5>,  'True',  'Linear Recurrence of Second Order: (1, 1, 2, 3, 5)  => True';
+pwc-test './ch-2.raku', |<4 2 4 5 7>,  'False', 'Linear Recurrence of Second Order: (1, 1, 2, 3, 5)  => False';
+pwc-test './ch-2.raku', |<4 1 2 -3 8>, 'True',  'Linear Recurrence of Second Order: (4, 1, 2, -3, 8) => True';
+
+done-testing;