Исходники и презентации

lessons/structs/functional_options/main.go

@@ -0,0 +1,50 @@
+package main
+
+type Option func(*User)
+
+func WithEmail(email string) Option {
+	return func(user *User) {
+		user.Email = email
+	}
+}
+
+func WithPhone(phone string) Option {
+	return func(user *User) {
+		user.Phone = phone
+	}
+}
+
+func WithAddress(address string) Option {
+	return func(user *User) {
+		user.Address = address
+	}
+}
+
+type User struct {
+	Name    string
+	Surname string
+	Email   string
+	Phone   string
+	Address string
+}
+
+func NewUser(name string, surname string, options ...Option) User {
+	user := User{
+		Name:    name,
+		Surname: surname,
+	}
+
+	for _, option := range options {
+		option(&user)
+	}
+
+	return user
+}
+
+func main() {
+	user1 := NewUser("Ivan", "Ivanov", WithEmail("ivanov@yandex.ru"))
+	user2 := NewUser("Petr", "Petrov", WithEmail("petrov@yandex.ru"), WithPhone("+67453"))
+
+	_ = user1
+	_ = user2
+}