package encoding/base64
NewEncoder returns a new base64 stream encoder. Data written to the returned writer will be encoded using enc(1st parameter) and then written to w(2nd parameter). Base64 encodings operate in 4-byte blocks; when finished writing, the caller must Close the returned encoder to flush any partially written blocks.
Golang encoding/base64.NewEncoder function usage example
b := &bytes.Buffer{}
e := base64.NewEncoder(base64.StdEncoding, b)
References :
http://golang.org/pkg/encoding/base64/#NewEncoder
https://www.socketloop.com/references/golang-encoding-base32-newencoder-function-examples
