go - map 范围循环中的空接口(interface)

Question

下面的代码没有按预期工作。

package main

import "fmt"

func main() {
  questions := make(map[int]interface{})
  questions[1] = map[interface{}]string{
    "q1": "This is Question - 1?",
    "op1": "This is Option - 1",
    "op2": "This is Option - 2",
    true: "This is Option - 1",
  }

  // This give map[interface {}]string
  fmt.Printf("%T \n", questions[1])

  // This not working
  for key, val := range questions[1] {
    printf("%v : %v", key, val)
  }


}

遍历 map 的 for 循环不工作。

Go 编译器给出错误“无法范围覆盖问题[1](类型接口(interface){})”

Answer 1

理解 questions[1] 类型是 map

for key, val := range questions[1].(map[interface{}]string) {
    fmt.Printf("%v : %v\n", key, val)
}