go channel

channel 与 range

package main

import "fmt"

func main() {
	c := make(chan int)
	go func() {
		for i := 0; i < 5; i++ {
			c <- i
		}
		close(c) // 如果不close, 会出现goroutine deadlock
	}()
        
        /*
	for {
		if data, ok := <-c; ok {
			fmt.Println(data)
		} else {
			break
		}
	}
        */
        
        // 等价于上面
	for data := range c {
            fmt.Println(data)
	}
        
	fmt.Println("Finished")
}

channel 与 select

import "fmt"
func fibonacci(c, quit chan int) {
    x, y := 0, 1
    for {
        select {
        case c <- x:
            x, y = y, x+y
        case <-quit:
            fmt.Println("quit")
            return
        }
    }
}
func main() {
    c := make(chan int)
    quit := make(chan int)
    go func() {
        for i := 0; i < 10; i++ {
            fmt.Println(<-c)
        }
        quit <- 0
    }()
    fibonacci(c, quit)
}