Golang : Smarter Error Handling with strings.Contains()

In this tutorial, we will learn some simple trick with strings.Contain() function on capturing the error message and handling it according to the error message.

Most of the Go source code will typically use these lines of codes to handle error.

For example :

 if err != nil {
 panic(err)
 }

or

 if err!= nil {
 fmt.Println(err.Error())
 os.Exit(1)
 }

Let's see how error can be handled in a smarter way. This block of code will first evaluates the error string and then do the necessary action.

 if !strings.Contains(err.Error(), "timed out") {
  fmt.Printf("resulting error not a timeout: %s", err)
 }

or

 if strings.Contains(err.Error(), "overflow") {
  // DO SOMETHING TO RECOVER THE OVERFLOW
 }

Hope you will find this short Golang tutorial useful