solutions week 323

2 files changed, 52 insertions, 0 deletions

diff --git a/challenge-323/wambash/raku/ch-1.raku b/challenge-323/wambash/raku/ch-1.raku
new file mode 100644
index 0000000000..bda0944f0a
--- /dev/null
+++ b/challenge-323/wambash/raku/ch-1.raku
@@ -0,0 +1,26 @@
+#!/usr/bin/env raku
+
+enum Operation (
+    'x++' =>  1,
+    '++x' =>  1,
+    'x--' => -1,
+    '--x' => -1,
+);
+
+sub increment-decrement (+operations) {
+    operations
+    andthen .map: { Operation::{$_} }\
+    andthen .sum
+}
+
+multi MAIN (Bool :test($)!) {
+    use Test;
+    is increment-decrement(< --x x++ x++ >), 1;
+    is increment-decrement(< x++ ++x x++ >), 3;
+    is increment-decrement(< x++ ++x x-- --x >), 0;
+    done-testing;
+}
+
+multi MAIN (+operations) {
+    say increment-decrement operations;
+}
diff --git a/challenge-323/wambash/raku/ch-2.raku b/challenge-323/wambash/raku/ch-2.raku
new file mode 100644
index 0000000000..50bfb5426f
--- /dev/null
+++ b/challenge-323/wambash/raku/ch-2.raku
@@ -0,0 +1,26 @@
+#!/usr/bin/env raku
+
+sub tax-amount-redu (($income, $acc=0), ($upto, $tax)) {
+    my $tax-base = $income min $upto;
+    ($income - $tax-base, $acc + $tax-base*$tax/100 )
+}
+
+sub tax-amount (+tax,:$income) {
+     my @tax-diff = tax.produce: -> ($aupto, $atax), ($upto,$tax) { ($upto-$aupto, $tax) };
+
+    ($income,0), |@tax-diff
+    andthen .reduce: &tax-amount-redu
+    andthen .tail
+}
+
+multi MAIN (Bool :test($)!) {
+    use Test;
+    is tax-amount((3,50),(7,10),(12,25)):10income, 2.65;
+    is tax-amount((1,0),(4,25),(5,50)):2income, 0.25;
+    is tax-amount(((2,50),)):0income, 0;
+    done-testing;
+}
+
+multi MAIN (+tax, :$income) {
+    say tax-amount tax.batch(2), :$income;
+}