Golang : Convert []string to []byte examples

Problem :

You need a fast way to convert a []string to []byte type. To use in situations such as storing text data into a random access file or other type of data manipulation that requires the input data to be in []byte type.

Solutions :

Example 1:

 package main

 import (
  "fmt"
  "strings"
 )

 func main() {

  stringSlice := []string{"hello", "bye"}

  stringByte := "\x00" + strings.Join(stringSlice, "\x20\x00") // x20 = space and x00 = null

  fmt.Println([]byte(stringByte))
  
  fmt.Println(string([]byte(stringByte)))
 }

Output :

[0 104 101 108 108 111 32 0 98 121 101]

hello bye

Example 2:

 package main

 import (
  "bytes"
  "encoding/gob"
  "fmt"
 )

 func main() {

  stringSlice := []string{"hello", "bye"}

  buffer := &bytes.Buffer{}

  gob.NewEncoder(buffer).Encode(stringSlice)
  byteSlice := buffer.Bytes()
  fmt.Printf("%q\n", byteSlice)

  fmt.Println("---------------------------")

  backToStringSlice := []string{}
  gob.NewDecoder(buffer).Decode(&backToStringSlice)
  fmt.Printf("%v\n", backToStringSlice)
 }

Output :

[12 255 129 2 1 2 255 130 0 1 12 0 0 14 255 130 0 2 5 104 101 108 108 111 3 98 121 101]

[hello bye]