How to do it...

1. Open the console and create the folder chapter02/recipe08.
2. Navigate to the directory.
3. Create the file win1250.txt with content Gdańsk. The file must be encoded in the windows-1250 charset. If you are not sure how to do that, just jump to step 6 and after you complete step 7, which will create the windows-1250 encoded file, you can rename the out.txt file and go back to step 4.
4. Create the decode.go file with the following content:

        package main

        import (
          "fmt"
          "io/ioutil"
          "os"
          "strings"

          "golang.org/x/text/encoding/charmap"
        )

        func main() {

          // Open windows-1250 file.
          f, err := os.Open("win1250.txt")
          if err != nil {
            panic(err)
          }
          defer f.Close()

          // Read all in raw form.
          b, err := ioutil.ReadAll(f)
          if err != nil {
            panic(err)
          }
          content := string(b)

          fmt.Println("Without decode: " + content)

          // Decode to unicode
          decoder := charmap.Windows1250.NewDecoder()
          reader := decoder.Reader(strings.NewReader(content))
          b, err = ioutil.ReadAll(reader)
          if err != nil {
            panic(err)
          }
          fmt.Println("Decoded: " + string(b))

        }

1. Run the code by executing go run decode.go.
2. See the output in the Terminal:

1. Create a file with the name encode.go with the following content:

        package main

        import (
          "io"
          "os"

          "golang.org/x/text/encoding/charmap"
        )

        func main() {

          f, err := os.OpenFile("out.txt", os.O_CREATE|os.O_RDWR,
                                os.ModePerm|os.ModeAppend)
          if err != nil {
            panic(err)
          }
          defer f.Close()

          // Decode to unicode
          encoder := charmap.Windows1250.NewEncoder()
          writer := encoder.Writer(f)
          io.WriteString(writer, "Gdańsk")

        }

1. Run the code by executing go run encode.go.
2. See the output in the file out.txt in Windows-1250 encoding and UTF-8 encoding.