Initial data commit

Task/Arithmetic-Complex/Groovy/arithmetic-complex-2.groovy

@@ -0,0 +1,17 @@
+import org.codehaus.groovy.runtime.DefaultGroovyMethods
+
+class ComplexCategory {
+    static Complex getI (Number a) { [0, a] as Complex }
+
+    static Complex plus (Number a, Complex b) { b + a }
+    static Complex minus (Number a, Complex b) { -b + a }
+    static Complex multiply (Number a, Complex b) { b * a }
+    static Complex div (Number a, Complex b) { ([a] as Complex) / b  }
+    static Complex power (Number a, Complex b) { ([a] as Complex) ** b }
+
+    static <N extends Number,T> T asType (N a, Class<T> type) {
+        type == Complex \
+            ? [a as Number] as Complex
+            : DefaultGroovyMethods.asType(a, type)
+    }
+}