Convert JSON file into csv in golang - json

Question

this following code is working successfully, it converts my json file into a csv file. But I would like to add titles to each of my columns into the csv file. Unfortunately, I can't find out how to do that. If anyone has an idea it would be very helpful.
Regards
package main
import (
"encoding/json"
"encoding/csv"
"fmt"
"io/ioutil"
"os"
"net/http"
"strconv"
)
type People struct {
Name string
Craft string
}
type General struct {
People []People
Number int
Message string
}
func main() {
// Reading data from JSON File
response, err := http.Get("http://api.open-notify.org/astros.json")
if err != nil {
fmt.Printf("The Http request failed with error %s\n", err)
}
data,_ := ioutil.ReadAll(response.Body)
//fmt.Println(string(data))
// Unmarshal JSON data
var general General
json.Unmarshal([]byte(data), &general)
//fmt.Printf("First person: %s, Message: %s", general.People[0].Name, general.Message)
// Create a csv file
csvdatafile, err := os.Create("./astros.csv")
if err != nil {
fmt.Println(err)
}
defer csvdatafile.Close()
// Write Unmarshaled json data to CSV file
w := csv.NewWriter(csvdatafile)
for _, obj := range general.People {
fmt.Println("Are you going into the for ?")
var record []string
record = append(record, strconv.Itoa(general.Number), general.Message)
record = append(record, obj.Name, obj.Craft)
w.Write(record)
fmt.Println("Are you coming here")
record = nil
}
w.Flush()
fmt.Println("Appending succed")
}

Answer 1

Well if you want it just for this example can you just write the column headers to the file before the for statement, that is:
w := csv.NewWriter(csvdatafile)
//new code
var header []string
header = append(header, "Number")
header = append(header, "Message")
header = append(header, "Name")
header = append(header, "Craft")
w.Write(header)
for _, obj := range general.People {