How to get the keys as string array from reflect MapKeys?

I need to use strings.Join(invoicesBatch, ",") to join a string array.

But the array I got from the map using reflect.ValueOf(invoiceList).MapKeys() is reflect.Value array. Is there a easy way to convert them into a string array.

The map was initialized with string key.

instead of using reflection you can use a for loop and range to get a slice of keys like this

package main
import (
"fmt"
"strings"
)
func main() {
  data := map[string]int{
	  "A": 1,
	  "B": 2,
  }
  keys := make([]string, 0, len(data))
  for key := range data {
    keys = append(keys, key)
  }
  fmt.Print(strings.Join(keys, ","))
}

You will need to use loop but you won't need to create a new slice every time as we already know the length. Example:

func main() {
	a := map[string]int{
		"A": 1, "B": 2,
	}
	keys := reflect.ValueOf(a).MapKeys()
	strkeys := make([]string, len(keys))
	for i := 0; i < len(keys); i++ {
		strkeys[i] = keys[i].String()
	}
	fmt.Print(strings.Join(strkeys, ","))
}