有没有办法将for循环作为go例程运行而不将其放在单独的func中

Question

假设我想设置一个for循环但不想阻止执行,显然我可以将for循环放在一个函数中f并调用go f并继续我的生活,
但我很好奇是否有办法go for直接调用, 就像是:

fmt.Println("We are doing something")
//line below is my question
go for i := 1; i < 10; i ++ {
    fmt.Println("stuff running in background")
} 
// life goes on
fmt.Println("c'est la vie")

Answer 1

实现这一目标的唯一方法是通过围绕它创建一个函数.在您的示例中,这是您将如何做到这一点.

fmt.Println("We are doing something")
//line below is my question
go func() {
    for i := 1; i < 10; i ++ {
        fmt.Println("stuff running in background")
    } 
}()
// life goes on
fmt.Println("c'est la vie")

记下最后函数的实际调用}().否则编译器会向你抱怨.

Answer 2

如果要在后台运行每个循环,请将goroutine嵌套在循环中并使用该sync.WaitGroup结构.

import "sync"

fmt.Println("We are doing something")

//line below is my question
wg := sync.WaitGroup{}

// Ensure all routines finish before returning
defer wg.Wait()

for i := 1; i < 10; i ++ {
    wg.Add(1)
    go func() {
        defer wg.Done()
        fmt.Println("stuff running in background")
    }()
}

// life goes on
fmt.Println("c'est la vie")