Golang，通过指针更改数组

func foo(arr interface{})

foo(&arrayToChange)

Then I find that, I cannot change the array by pointer a simple example for you.

package main

import (
    "fmt"
)

func A(out interface{}) {
    arr := make([]interface{}, 0)
    arr = append(arr, "foo", 2.2)
    out = &arr
    B(out)
}

func B(out interface{}) {
    arr := make([]interface{}, 0)
    arr = append(arr, "bar", "foo", "anything")
    out = &arr
}

func main() {
    arr := make([]interface{}, 0)
    arr = append(arr, 1, 2, 3)
    fmt.Printf("%T
", &arr)
    A(&arr)
    fmt.Println(arr)
}