How to use bytes.Buffer with gob encoder/decoder.

gob-example.go

package main

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

type Data struct {
	A int
	B string
	C bool
}

func writeGob(w io.Writer, data []Data) {
	enc := gob.NewEncoder(w)
	enc.Encode(data)
}

func readGob(r io.Reader) (data []Data) {
	dec := gob.NewDecoder(r)
	dec.Decode(&data)
	return
}

func printData(data []Data) {
	for i, d := range data {
		println(i, d.A, d.B, d.C)
	}
}

func main() {
	src := []Data{
		Data{123, "abc", true},
		Data{456, "def", false},
		Data{789, "xyz", true},
	}

	var buf bytes.Buffer
	writeGob(&buf, src)
	dst := readGob(&buf)
	printData(dst)
}