asdf

book_with_bridge/defer/main.go

@@ -1 +1,24 @@
-package defer
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+func logger(s string) func() {
+	fmt.Printf("Enter in %s\n",s)
+	now := time.Now()
+	return func () {
+		fmt.Printf("Time elapsed %s\n",time.Since(now))
+		fmt.Printf("Exit from func %s\n",s)
+	}
+}
+
+func SlowOP() {
+	defer logger("SlowOP")()
+	time.Sleep(2*time.Second)
+}
+	
+func main() {
+	SlowOP()	
+}