写个demo测试一下，channel中传递的是数据的拷贝，还是引用？

预期：传递的是引用类型

package main

import (
    "fmt"
)

func main() {
    var sliceChan chan [2]map[string]int = make(chan [2]map[string]int,2)

    //construct array
    m1 := map[string]int{
        "rows":12,}
    m2 := map[string]int{
        "columns":10,}
    bulk := [2]map[string]int{m1,m2}

    //directly read then
    sliceChan <- bulk
    e := <-sliceChan
    fmt.Println(e)

    //modify m2
    m2["finish"] = 1
    fmt.Println(e);
}

最终输出的结果，跟预想的一样。打印的结果说明，e使用引用的是原数据的地址。

[map[rows:12] map[columns:10]]
[map[rows:12] map[columns:10 finish:1]]

修改chan数据类型，下面替换为依次替换为数组、slice、struct对象。

传递数组类型@H_301_14@

func main() {
    var sliceChan chan [2]int = make(chan [2]int,1)

    //construct array
    bulk := [2]int{1,2}

    //directly read then
    sliceChan <- bulk
    e := <-sliceChan
    fmt.Println(e)

    //modify m2
    bulk[1] = 3
    fmt.Println(e);
    fmt.Println(bulk)
}

[1 2]
[1 2]
[1 3]

func main() {
    var sliceChan chan []int = make(chan []int,1)

    //construct array
    bulk := []int{1,2}

    //directly read then
    sliceChan <- bulk
    e := <-sliceChan
    fmt.Println(e)

    //modify m2
    bulk[1] = 3
    fmt.Println(e);
    fmt.Println(bulk)
}

[1 2]
[1 3]
[1 3]

func main() {
    type people struct {
        name string
        age int
    }
    var sliceChan chan people = make(chan people,1)

    //construct array
    bulk := people{
        "zhangshan",28,}

    //directly read then
    sliceChan <- bulk
    e := <-sliceChan
    fmt.Println(e)

    //modify m2
    bulk.name = "wangwu"
    fmt.Println(e);
    fmt.Println(bulk)
}

{zhangshan 28}
{zhangshan 28}
{wangwu 28}