Bytes and Slices

The bytes package

Slices of bytes are so common that Go has a bytes package with manipulation functions for that kind of type. It is very analogous to the strings package. Moreover, it contains a very handy type Buffer:

import "bytes"
type Buffer struct {
  ...
}

It is a variable-sized buffer of bytes with Read and Write methods because reading and writing an unknown number of bytes is best done buffered. ...