Never using named result parameters

Mistake

Name result parameters should be used when would provide better context.

type locator interface {
  getCoordinates(address string) (float32, float32, error)
}

Name result parameters should not be used when they provide no value

func ReadFull(r io.Reader, buf []byte) (n int, err error) {
  // ...
}

type locator interface {
  getCoordinates(address string) (lng, lat float32, error)
}

func ReadFull(r io.Reader, buf []byte) (int, error) {
  // ...
}