feat: add solution for challenge 345 from BarrOff

1 files changed, 31 insertions, 0 deletions

diff --git a/challenge-345/barroff/raku/ch-1.p6 b/challenge-345/barroff/raku/ch-1.p6
new file mode 100644
index 0000000000..abd864f45f
--- /dev/null
+++ b/challenge-345/barroff/raku/ch-1.p6
@@ -0,0 +1,31 @@
+#!/usr/bin/env raku
+
+use v6.d;
+
+sub peak-positions(@ints --> Array:D) {
+    my @prep = @ints[0] > @ints[1] ?? (0) !! ();
+    my @appe = @ints[*-1] > @ints[*-2] ?? (@ints.elems - 1) !! ();
+    my @result = grep(
+        { @ints[$_] > @ints[$_ - 1] and @ints[$_] > @ints[$_ + 1] },
+        1..@ints.elems - 2
+    );
+    @result.prepend(@prep).append(@appe);
+}
+
+#| Run test cases
+multi sub MAIN('test') {
+    use Test;
+    plan 5;
+
+    is peak-positions([1, 3, 2]), (1), 'works for [1, 3, 2]';
+    is peak-positions([2, 4, 6, 5, 3]), (2), 'works for [2, 4, 6, 5, 3]';
+    is peak-positions([1, 2, 3, 2, 4, 1]), (2, 4), 'works for [1, 2, 3, 2, 4, 1]';
+    is peak-positions([5, 3, 1]), (0), 'works for [5, 3, 1]';
+    is peak-positions([1, 5, 1, 5, 1, 5, 1]), (1, 3, 5),
+        'works for [1, 5, 1, 5, 1, 5, 1]';
+}
+
+#| Take user provided numbers 5 9 3 4 6
+multi sub MAIN(*@ints) {
+    say peak-positions(@ints);
+}