Go入门-goroutine&channel小练习

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理解 goroutine 的并发

由浅入深剖析 go channel

Channel的两个小练习

package main

import "fmt"

func main() {
	ch := make(chan int)
	quit := make(chan bool)
	go shower(ch, quit)
	for i := 0; i<10; i++ {
		ch <- i
	}
	quit <- false
}

func shower(c chan int, quit chan bool) {
	for {
		select {
		case j:= <-c:
			fmt.Printf("%d\n", j)
		case <-quit:
			break
		}
	}
}

package main

import "fmt"

func main(){
	x := fib()
	for i:= 0; i< 10; i++ {
		fmt.Println(<-x)
	}
}

func fib() <-chan int {
	x := make(chan int, 2)
	a,b,out := dup3(x)
	go func() {
		x <- 0
		x <- 1
		<-a
		for {
			x<-<-a+<-b
		}
	}()
	return out
}

func dup3(in <- chan int) (<-chan int, <-chan int, <-chan int) {
	a,b,c := make(chan int, 2),make(chan int,2),make(chan int,2)
	go func() {
		for {
			x:=<-in
			a <- x
			b <- x
			c <- x
		}
	}()
	return a,b,c
}