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Go Language Go Language Overview Custom Types Methods

Kiwi Moe
Kiwi Moe
3,365 Points

It seems to work correctly on my local computer,but showed Bummer when check work

It told me hours(0).Increment() should be 1,but showed 0. and this method return 1 on my computer

package clock

type Hours int

func (h Hours) Increment() Hours {
    return (h + 1) % 24

1 Answer

I recommend re-watching the video. :wink:

  • You don't return anything. Your function is still returning type Hours.
  • The argument should be a pointer.
  • When you access or change the value of the parameter, you need to "unbox" (more formally, dereference) the pointer passed in.
func (h *Hours) Increment() {
    *h = (*h + 1) % 24

Happy coding! :zap: ~Alex