Golang bytes.Buffer.Bytes() function example

package bytes

Bytes returns a slice of the contents of the unread portion of the buffer; len(buffer.Bytes()) == buffer.Len(). If the caller changes the contents of the returned slice, the contents of the buffer will change provided there are no intervening method calls on the Buffer.

Golang bytes.Buffer.Bytes() function usage example

 package main

 import (
 "bytes"
 "fmt"
 )

 func main() {
 buff := bytes.NewBufferString("abcdefghi")

 unread := buff.Bytes()

 fmt.Println(string(unread)) // since nothing has been read. it will return everything

 var readbuff [3]byte

 buff.Read(readbuff[0:2])

 unread2 := buff.Bytes() // this time only return the unread portion

 fmt.Println(string(unread2))
 }

Output :

abcdefghi

cdefghi

Reference :

http://golang.org/pkg/bytes/#Buffer.Bytes