func Encode(dst, src []byte) int is a method defined in the encoding packages in Golang that encodes source bytes of an array to a destination bytes array and returns the number of bytes written in the encoded array. The type of encoding depends on which Golang package is used. func Encode(dst, src []byte) int is defined in the following Golang packages:
encoding/ascii85encoding/asn1encoding/base32encoding/base64encoding/binaryencoding/csvencoding/gobencoding/hexencoding/jsonencoding/pemencoding/xmlsrc: Array of type byte.
dst: Array to which the encoded output will be written.
The number of bytes written to dst.
package mainimport ("encoding/hex""fmt")func main() {src := []byte("Hexadecimal encoding in Golang.")dst := make([]byte, hex.EncodedLen(len(src)))var bytes_written int = hex.Encode(dst, src)fmt.Printf("Encoded array: %s\n", dst)fmt.Printf("Number of bytes written: %d\n", bytes_written)}
In the above example, we initialize the src bytes array that stores the bytes of the string “Hexadecimal encoding in Golang”. We initialize the dst array with the size that will result after encoding.
The method hex.EncodedLen() returns the size of the encoded array. Then, we use hex.encode(), which encodes the src array and writes the encoded result in dst, and returns the number of bytes written.
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