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⚙️ Option Pattern в Go: гибкая и читаемая настройка объектов

В статье Leapcell ["Option Pattern in Go: Advanced Parameter Handling"](https://dev.to/leapcell/option-pattern-in-go-advanced-parameter-handling-15hf) рассматривается эффективный способ управления параметрами функций и конструкторов в Go.:contentReference[oaicite:7]{index=7}

## 🧩 Проблема

:contentReference[oaicite:9]{index=9}:contentReference[oaicite:11]{index=11}


func NewServer(addr string, port int, timeout time.Duration, maxConn int, protocol string) *Server {
// ...
}


Недостатки:
- :contentReference[oaicite:13]{index=13}
- :contentReference[oaicite:16]{index=16}
- :contentReference[oaicite:19]{index=19}
- :contentReference[oaicite:22]{index=22}:contentReference[oaicite:24]{index=24}

## 💡 Решение: Option Pattern

:contentReference[oaicite:26]{index=26}:contentReference[oaicite:28]{index=28}


type Server struct {
addr string
port int
timeout time.Duration
maxConn int
protocol string
}

type Option func(*Server)

func WithTimeout(t time.Duration) Option {
return func(s *Server) {
s.timeout = t
}
}

func WithMaxConn(max int) Option {
return func(s *Server) {
s.maxConn = max
}
}



:contentReference[oaicite:30]{index=30}:contentReference[oaicite:32]{index=32}


func NewServer(addr string, opts ...Option) *Server {
s := &Server{
addr: addr,
port: 8080,
timeout: 30 * time.Second,
maxConn: 100,
protocol: "tcp",
}

for _, opt := range opts {
opt(s)
}
return s
}


Использование:


server := NewServer("localhost",
WithTimeout(60*time.Second),
WithMaxConn(500),
)


## 🛠️ Дополнительные возможности

- Валидация параметров:


func WithPort(port int) Option {
return func(s *Server) {
if port < 0 || port > 65535 {
panic("invalid port number")
}
s.port = port
}
}


- Группировка опций:


type NetworkOptions struct {
Protocol string
Timeout time.Duration
}

func WithNetworkOptions(opts NetworkOptions) Option {
return func(s *Server) {
s.protocol = opts.Protocol
s.timeout = opts.Timeout
}
}


Преимущества

- :contentReference[oaicite:34]{index=34}
- :contentReference[oaicite:37]{index=37}
- :contentReference[oaicite:40]{index=40}
- :contentReference[oaicite:43]{index=43}:contentReference[oaicite:45]{index=45}

:contentReference[oaicite:47]{index=47}:contentReference[oaicite:49]{index=49}

📌 Читать



tg-me.com/golang_interview/1192
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⚙️ Option Pattern в Go: гибкая и читаемая настройка объектов

В статье Leapcell ["Option Pattern in Go: Advanced Parameter Handling"](https://dev.to/leapcell/option-pattern-in-go-advanced-parameter-handling-15hf) рассматривается эффективный способ управления параметрами функций и конструкторов в Go.:contentReference[oaicite:7]{index=7}

## 🧩 Проблема

:contentReference[oaicite:9]{index=9}:contentReference[oaicite:11]{index=11}


func NewServer(addr string, port int, timeout time.Duration, maxConn int, protocol string) *Server {
// ...
}


Недостатки:
- :contentReference[oaicite:13]{index=13}
- :contentReference[oaicite:16]{index=16}
- :contentReference[oaicite:19]{index=19}
- :contentReference[oaicite:22]{index=22}:contentReference[oaicite:24]{index=24}

## 💡 Решение: Option Pattern

:contentReference[oaicite:26]{index=26}:contentReference[oaicite:28]{index=28}


type Server struct {
addr string
port int
timeout time.Duration
maxConn int
protocol string
}

type Option func(*Server)

func WithTimeout(t time.Duration) Option {
return func(s *Server) {
s.timeout = t
}
}

func WithMaxConn(max int) Option {
return func(s *Server) {
s.maxConn = max
}
}



:contentReference[oaicite:30]{index=30}:contentReference[oaicite:32]{index=32}


func NewServer(addr string, opts ...Option) *Server {
s := &Server{
addr: addr,
port: 8080,
timeout: 30 * time.Second,
maxConn: 100,
protocol: "tcp",
}

for _, opt := range opts {
opt(s)
}
return s
}


Использование:


server := NewServer("localhost",
WithTimeout(60*time.Second),
WithMaxConn(500),
)


## 🛠️ Дополнительные возможности

- Валидация параметров:


func WithPort(port int) Option {
return func(s *Server) {
if port < 0 || port > 65535 {
panic("invalid port number")
}
s.port = port
}
}


- Группировка опций:


type NetworkOptions struct {
Protocol string
Timeout time.Duration
}

func WithNetworkOptions(opts NetworkOptions) Option {
return func(s *Server) {
s.protocol = opts.Protocol
s.timeout = opts.Timeout
}
}


Преимущества

- :contentReference[oaicite:34]{index=34}
- :contentReference[oaicite:37]{index=37}
- :contentReference[oaicite:40]{index=40}
- :contentReference[oaicite:43]{index=43}:contentReference[oaicite:45]{index=45}

:contentReference[oaicite:47]{index=47}:contentReference[oaicite:49]{index=49}

📌 Читать

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Telegram has exploded as a hub for cybercriminals looking to buy, sell and share stolen data and hacking tools, new research shows, as the messaging app emerges as an alternative to the dark web.An investigation by cyber intelligence group Cyberint, together with the Financial Times, found a ballooning network of hackers sharing data leaks on the popular messaging platform, sometimes in channels with tens of thousands of subscribers, lured by its ease of use and light-touch moderation.

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Durov said on his Telegram channel today that the two and a half year blockchain and crypto project has been put to sleep. Ironically, after leaving Russia because the government wanted his encryption keys to his social media firm, Durov’s cryptocurrency idea lost steam because of a U.S. court. “The technology we created allowed for an open, free, decentralized exchange of value and ideas. TON had the potential to revolutionize how people store and transfer funds and information,” he wrote on his channel. “Unfortunately, a U.S. court stopped TON from happening.”

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