Golang snappy encode and decode example

snappy.go

package main

import (
	"fmt"
	"log"

	"github.com/golang/snappy"
)

func main() {
	src := []byte("ABCCCCCCCCCCCCCCCCCCC")
	encoded := snappy.Encode(nil, src)
	fmt.Println(string(encoded)) // ABCF

	decoded, err := snappy.Decode(nil, encoded)
	if err != nil {
		log.Fatal(err)
	}

	fmt.Println(string(decoded)) // ABCCCCCCCCCCCCCCCCCCC
}

I'm not yet clear on the purpose of passing in dst? it seems like some sort of auxilary slice of some sort

It is confusing, if you pass dst the Decode() will use that existing slice of bytes to decompress into. If you don't use dst and just use the return "decoded" then Decode() creates a new slice of bytes for you.

This way if you have to decompress many things over and over you can reuse the same dst byte slice.

Normally you should return _, err = Decoder() or when calling Decode() pass nil for the dst field.

Thanks for the clarification. Example is updated