Balancing brackets. Couldn't be bothered to use a regex

1 files changed, 27 insertions, 0 deletions

diff --git a/challenge-042/simon-proctor/raku/ch-2.p6 b/challenge-042/simon-proctor/raku/ch-2.p6
new file mode 100644
index 0000000000..50178cdb05
--- /dev/null
+++ b/challenge-042/simon-proctor/raku/ch-2.p6
@@ -0,0 +1,27 @@
+#!/usr/bin/env perl6
+
+use v6;
+
+#| Generate a random string of brackets then test if they are balanced
+sub MAIN() {
+    my $brackets = ("(",")").roll( (1..25).pick() * 2 ).join("");
+    say "String to test {$brackets}";
+    say "Balanced? {balanced($brackets)}";
+}
+
+sub balanced( Str \brackets ) {
+    my @list = brackets.comb("");
+    my $count = 0;
+    for @list -> \bracket {
+        given bracket {
+            when "(" {
+                $count++;
+            }
+            when ")" {
+                $count--;
+            }
+        }
+        return False if $count < 0;
+    }
+    return $count == 0;
+}