convert chromosome format

main.go

package main

import (
	"encoding/csv"
	"io/ioutil"
	"log"
	"net/http"
	"os"
	"strconv"
	"strings"
)

func BytesToString(data []byte) string {
	return string(data[:])
}

func main() {

	buildNumber := "hg38"

	file, err := os.Create("chrConversion.csv")
	if err != nil {
		log.Fatal(err)
	}

	defer func() {
		err = file.Close()
		if err != nil {
			log.Println(err)
		}
	}()

	writer := csv.NewWriter(file)
	defer writer.Flush()

	for chr := 1; chr <= 22; chr++ {

		var data []string

		client := &http.Client{}
		req, err := http.NewRequest("GET", "https://mutalyzer.nl/json/chromAccession?"+"build="+buildNumber+"&name="+"chr"+strconv.FormatInt(int64(chr), 10), nil)
		if err != nil {
			log.Fatal(err)
		}
		resp, err := client.Do(req)
		if resp == nil {
			log.Fatal(err)
		}
		if resp.StatusCode != 200 {
			log.Fatal(err)
		}

		bodyBytes, err := ioutil.ReadAll(resp.Body)
		if err != nil {
			log.Fatal(err)
		}

		chrConverted := BytesToString(bodyBytes)
		removeDouble := strings.Replace(chrConverted, "\"", "", 2)

		data = append(data, "chr"+strconv.FormatInt(int64(chr), 10), removeDouble)

		err = writer.Write(data)
		if err != nil {

			log.Fatal(err)

		}

	}

}