in-the-wild.md

Examples seen in the wild

Multiplexing - Fan-in

func fanIn(input1, input2 <-chan string) <-chan string {
    c := make(chan string)
    go func() { for { c <- <-input1 } }()
    go func() { for { c <- <-input2 } }()
    return c
}

Go Concurrency Patterns #27

Fan-in using select

func fanIn(input1, input2 <-chan string) <-chan string {
    c := make(chan string)
    go func() {
        for {
            select {
            case s := <-input1:  c <- s
            case s := <-input2:  c <- s
            }
        }
    }()
    return c
}

Go Concurrency Patterns #34

Daisy-chain

func f(left, right chan int) {
    left <- 1 + <-right
}

func main() {
    const n = 10000
    leftmost := make(chan int)
    right := leftmost
    left := leftmost
    for i := 0; i < n; i++ {
        right = make(chan int)
        go f(left, right)
        left = right
    }
    go func(c chan int) { c <- 1 }(right)
    fmt.Println(<-leftmost)
}

Go Concurrency Patterns #39

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