如何在不使用接收到的数据的情况下释放go通道？

Question

I created a channel and want to discharge it without using received values. However, compiler doesn't allow me to write code like this:

for i := range ch {
// code
}

complains that i is unused

substituting _ for i doesn't work either

What is the idiomatic way to do it?

Answer 1

Try this:

package main

import (
    "fmt"
)

func main() {
    ch := make(chan int)
    close(ch)
    for range ch {
        fmt.Println("for")
    }
    fmt.Println("done")
}

output:

done