Create decorate.go

structural/decorate.go

@@ -0,0 +1,28 @@
+package main
+
+type Object func(int) int
+
+func LogDecorate(fn Object) Object {
+	return func(n int) int {
+		log.Println("Starting the execution with the integer", n)
+
+		result := fn(n)
+
+		log.Println("Execution is completed with the result", result)
+
+        return result
+	}
+}
+
+func Double(n int) int {
+    return n * 2
+}
+
+func main(){
+  f := LogDecorate(Double)
+  f(5)
+}
+
+
+// Starting execution with the integer 5
+// Execution is completed with the result 10