Data commit

Task/Nested-templated-data/Crystal/nested-templated-data.crystal

@@ -0,0 +1,18 @@
+def with_payload(template, payload, used = nil)
+    template.map do |item|
+      if item.is_a? Enumerable
+        with_payload(item, payload, used)
+      else
+        used << item
+        payload[item]
+      end
+    end
+end
+
+p = {"Payload#0", "Payload#1", "Payload#2", "Payload#3", "Payload#4", "Payload#5", "Payload#6"}
+t = { { {1, 2}, {3, 4, 1}, 5}}
+used = Set(Int32).new
+puts with_payload(t, p, used)
+
+unused = Set(Int32).new((0..6).to_a) - used
+puts "Unused indices: #{unused}"