Go Error Handling

Error handling is a must for any program. The common approach in JavaScript, Python and Java is using try catch statement to handle exceptions, but we don't have exceptions in Go! For example, let's say we are trying to feed Eric Cartman with unhealthy food.

In Python, we would do the following.

def feed(kid, food):
  if food.calorie > 1000:
    raise ValueError("this will kill your kid")

  kid.eat(food)


def main():
  # Initialize the objects...
  try:
    feed(eric, french_fries)
  except ValueError:
    print "please don't do that, he's fat, not big bone"

In Go, we would simply return an error.

func feed(k *Kid, f *Food) error {
  if food.calorie > 1000 {
    return errors.New("this will kill your kid")
  }

  k.eat(f)
  return nil
}

func main() {
  // Initialize the objects...
  if err := feed(eric, frenchFries); err != nil {
    fmt.Println("please don't do that, he's fat, not big bone")
    log.Error(err) // Log the error
  }
}