Avoid checking if error is nil repetition?

Question

I\'m currently learning go and some of my code looks like this:

a, err := doA()
if err != nil {
  return nil, err
}
b, err := doB(a)
if err != nil {
  return nil         


        

Answer 1

You could use named return parameters to shorten things a bit

Playground link

func doStuff() (result string, err error) {
    a, err := doA()
    if err != nil {
        return
    }
    b, err := doB(a)
    if err != nil {
        return
    }
    result, err = doC(b)
    if err != nil {
        return
    }
    return
}

After you've been programming in Go a while you'll appreciate that having to check the error for every function makes you think about what it actually means if that function goes wrong and how you should be dealing with it.