随时可以运行x个goroutine

感谢大家帮助我解决这个问题。但是，尽管您都帮助我理解了该技术，但我认为没有人真正提供既可行又简单/易于理解的功能。

最后，我认为作为对我的特定问题的解答，我认为它更易于理解和实用，因此，如果其他人有相同的问题，我将在此处发布。

不知何故，最终看起来很像OneOfOne发布的内容，这很棒，因为现在我明白了。但是我一开始发现OneOfOne的代码很难理解，因为将函数传递给函数使人们很难理解到底是什么。我认为这种方式更有意义：

package mainimport ("fmt""sync")const xthreads = 5 // Total number of threads to use, excluding the main() threadfunc doSomething(a int) {    fmt.Println("My job is",a)    return}func main() {    var ch = make(chan int, 50) // This number 50 can be anything as long as it's larger than xthreads    var wg sync.WaitGroup    // This starts xthreads number of goroutines that wait for something to do    wg.Add(xthreads)    for i:=0; i<xthreads; i++ {        go func() { for {     a, ok := <-ch     if !ok { // if there is nothing to do and the channel has been closed then end the goroutine         wg.Done()         return     }     doSomething(a) // do the thing }        }()    }    // Now the jobs can be added to the channel, which is used as a queue    for i:=0; i<50; i++ {        ch <- i // add i to the queue    }    close(ch) // This tells the goroutines there's nothing else to do    wg.Wait() // Wait for the threads to finish}