swift guard let
func submit() { guard let name = nameField.text else { show("No name to submit") return } guard let address = addressField.text else { show("No address to submit") return } guard let phone = phoneField.text else { show("No phone to submit") return } sendToServer(name, address: address, phone: phone) } func sendToServer(name: String, address: String, phone: String) { ... }
