46 lines
963 B
Markdown
46 lines
963 B
Markdown
|
---
|
|||
|
|
paths:
|
|||
|
|
- "**/*.go"
|
|||
|
|
- "**/go.mod"
|
|||
|
|
- "**/go.sum"
|
|||
|
|
---
|
|||
|
|
# Go 模式 (Patterns)
|
|||
|
|
|
|||
|
|
> 本檔案擴展了 [common/patterns.md](../common/patterns.md)，包含 Go 特定內容。
|
|||
|
|
|
|||
|
|
## 函式選項模式 (Functional Options)
|
|||
|
|
|
|||
|
|
```go
|
|||
|
|
type Option func(*Server)
|
|||
|
|
|
|||
|
|
func WithPort(port int) Option {
|
|||
|
|
return func(s *Server) { s.port = port }
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
func NewServer(opts ...Option) *Server {
|
|||
|
|
s := &Server{port: 8080}
|
|||
|
|
for _, opt := range opts {
|
|||
|
|
opt(s)
|
|||
|
|
}
|
|||
|
|
return s
|
|||
|
|
}
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
## 精簡介面 (Small Interfaces)
|
|||
|
|
|
|||
|
|
在「使用」介面的地方定義介面，而非在「實作」介面的地方定義。
|
|||
|
|
|
|||
|
|
## 依賴注入 (Dependency Injection)
|
|||
|
|
|
|||
|
|
使用建構函式來注入依賴：
|
|||
|
|
|
|||
|
|
```go
|
|||
|
|
func NewUserService(repo UserRepository, logger Logger) *UserService {
|
|||
|
|
return &UserService{repo: repo, logger: logger}
|
|||
|
|
}
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
## 參考資源
|
|||
|
|
|
|||
|
|
參見技能 (Skill)：`golang-patterns`，獲取包含併發 (Concurrency)、錯誤處理與包組織的全面 Go 模式。
|