Telegram Group & Telegram Channel
⚙️ 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
Create:
Last Update:

⚙️ 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

BY Golang вопросы собеседований


Warning: Undefined variable $i in /var/www/tg-me/post.php on line 283

Share with your friend now:
tg-me.com/golang_interview/1192

View MORE
Open in Telegram


Golang вопросы собеседований Telegram | DID YOU KNOW?

Date: |

How to Use Bitcoin?

n the U.S. people generally use Bitcoin as an alternative investment, helping diversify a portfolio apart from stocks and bonds. You can also use Bitcoin to make purchases, but the number of vendors that accept the cryptocurrency is still limited. Big companies that accept Bitcoin include Overstock, AT&T and Twitch. You may also find that some small local retailers or certain websites take Bitcoin, but you’ll have to do some digging. That said, PayPal has announced that it will enable cryptocurrency as a funding source for purchases this year, financing purchases by automatically converting crypto holdings to fiat currency for users. “They have 346 million users and they’re connected to 26 million merchants,” says Spencer Montgomery, founder of Uinta Crypto Consulting. “It’s huge.”

What is Telegram Possible Future Strategies?

Cryptoassets enthusiasts use this application for their trade activities, and they may make donations for this cause.If somehow Telegram do run out of money to sustain themselves they will probably introduce some features that will not hinder the rudimentary principle of Telegram but provide users with enhanced and enriched experience. This could be similar to features where characters can be customized in a game which directly do not affect the in-game strategies but add to the experience.

Golang вопросы собеседований from tr


Telegram Golang вопросы собеседований
FROM USA