如何解释golang切片范围的现象

问题描述

type student struct {
    Name string
    Age  int
}

func main() {
    m := make(map[string]*student)
    s := []student{
        {Name: "Allen", Age: 24},
        {Name: "Tom", Age: 23},
    }

    for _, stu := range s {
        m[stu.Name] = &stu
    }
    fmt.Println(m)
    for key, value := range m {
        fmt.Println(key, value)
    }
}

结果:

艾伦& {Tom 23}

Allen &{Tom 23}

汤姆和{Tom 23}

Tom &{Tom 23}

在我看来，如何解释Slice的现象，stu应该是s的每个成员的地址，但是从结果来看，s具有相同的地址.

How to explain Slice's phenomenon, in my opinion, stu should be the address of every member of s, but from the results, s has the same address.

推荐答案

应用程序使用本地变量 stu 的地址.更改代码以获取slice元素的地址:

The application is taking the address of the local variable stu. Change the code to take the address of the slice element:

for i := range s {
    m[s[i].Name] = &s[i]
}

https://play.golang.org/p/0izo4gGPV7

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