Interface Subscription

14-adv-subscription/main.go:21–24

A Subscription delivers Items over a channel. Close cancels the subscription, closes the Updates channel, and returns the last fetch error, if any.

// subscription, closes the Updates channel, and returns the last fetch error,
// if any.
type Subscription interface {
	Updates() <-chan Item
	Close() error
}

// Subscribe returns a new Subscription that uses fetcher to fetch Items.
func Subscribe(fetcher Fetcher) Subscription {