Go Things I Love: Channels and Goroutines(justindfuller.com)

    chanOne := make(chan int)
    chanTwo := make(chan int)
    ctx := context.Background()

    // Receive whichever is ready first. Blocking
    select {
    case v := <-chanOne:
    case v := <-chanTwo:
    }

    // Non-blocking read
    select {
    case v := <-chanOne:
    default:
    }

    // Timeout and cancellation
    select {
    case v := <-chanOne:
    case <-time.After(1 * time.Second):
    // timeout
    case <-ctx.Done():
    // cancel
    }

    // Write or read, whichever channel is ready first
    select {
    case chanOne <- 1:
    case v := <-chanTwo:
    }