solutions week 123

2 files changed, 57 insertions, 0 deletions

diff --git a/challenge-123/wambash/raku/ch-1.raku b/challenge-123/wambash/raku/ch-1.raku
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+++ b/challenge-123/wambash/raku/ch-1.raku
@@ -0,0 +1,31 @@
+#!/usr/bin/env raku
+
+multi ugly-numbers ($n, :$ubounds!) {
+    my @twos   = 1,2,4  ... $ubounds;
+    my @threes = 1,3,9  ... $ubounds;
+    my @fives  = 1,5,25 ... $ubounds;
+
+    @twos X* @threes X* @fives
+    andthen .sort
+    andthen .[$n-1]
+}
+
+multi ugly-numbers ($n) {
+    my $guess = ugly-numbers $n, ubounds => 5**($n**(1/3));
+
+    ugly-numbers $n, ubounds => $guess;
+}
+
+multi MAIN ( $n ) {
+    say ugly-numbers $n;
+}
+
+multi MAIN (Bool :test($)!) {
+    use Test;
+    is ugly-numbers( 7),  8;
+    is ugly-numbers(10), 12;
+    is ugly-numbers(150, ubounds=> 5**(150**(1/3))), 5832;
+    is ugly-numbers(150),                            5832;
+    is ugly-numbers(2¹⁶), 2³³ * 3⁴⁹;
+    done-testing;
+}
diff --git a/challenge-123/wambash/raku/ch-2.raku b/challenge-123/wambash/raku/ch-2.raku
new file mode 100644
index 0000000000..2a813e131d
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+++ b/challenge-123/wambash/raku/ch-2.raku
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+#!/usr/bin/env raku
+class Point {
+    has $.x;
+    has $.y;
+
+    method COERCE ( @list ) {
+        Point.new: x => @list.[0], y => @list.[1];
+    }
+}
+
+sub square-points ( Point() $a, Point() $b, Point() $c, Point() $d ) {
+    ($a.x - $c.x)*($b.x - $d.x) + ($a.y - $c.y)*($b.y-$d.y) == 0
+    and
+    ($a.x - $c.x)² + ($a.y - $c.y)² ==  ($b.x - $d.x)² + ($b.y - $d.y)²
+}
+
+multi MAIN (*@points) {
+    say square-points |@points.batch(2)
+}
+
+multi MAIN (Bool :test($)!) {
+    use Test;
+    ok square-points((10,20),(20,20),(20,10),(10,10));
+    nok square-points((12,24),(16,10),(20,12),(18,16));
+    done-testing;
+}