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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                > # 使用 select 來多路復用 channel - **隨機選擇**:當多個 `channel` 同時滿足條件時,`select` 會隨機選擇一個執行。 - **默認分支**:可以在 `select` 中添加 `default` 分支,當所有的 `channel` 都沒有數據時,`select` 可以立即執行 `default` 分支而不阻塞。 ~~~ package main import ( "fmt" "time" ) func main() { // 創建兩個 channel ch1 := make(chan string) ch2 := make(chan string) // 啟動兩個 goroutine 分別向 ch1 和 ch2 發送消息 go func() { ch1 <- "message from ch1" }() go func() { ch2 <- "message from ch2" }() time.Sleep(time.Second) // 使用 select 來多路復用 channel for i := 0; i < 10; i++ { select { case msg1 := <-ch1: fmt.Println(msg1) case msg2 := <-ch2: fmt.Println(msg2) case <-time.After(2 * time.Second): fmt.Println("time out") } } } ~~~
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