string value of byte array - and back again to byte array-CodePudding

I am trying to benchmark some Decoding code. I have printed the encoding byte array, so I can hardcode it in the test file, to separate out the Encode part.

Therefore I have fmt.Println() a byte array

buf := bytes.Buffer{}
enc := gob.NewEncoder(&buf)
err := enc.Encode(<my struct>)
if err != nil {
    log.Fatal(err)
}
byteQuads := buf.Bytes()
buf.Reset()
fmt.Println(byteQuads) // << [77 255 129 3 1 1 7 82...]
// or
fmt.Println(string(byteQuads[:])) // << M��...

Question: How can read this hardcode into a byte array([]byte) again

b := []byte(???) // [77 255 129 3 1 1 7 82...] or M��
gob.NewDecoder(bytes.NewReader(b))

CodePudding user response：

Would this help? I'm assuming the bytesQuad can be read from your file.

type MyStruct struct {
    Value int
}

func main() {
    buf := bytes.Buffer{}
    enc := gob.NewEncoder(&buf)
    err := enc.Encode(MyStruct{Value: 3})
    if err != nil {
        log.Fatal(err)
    }
    byteQuads := buf.Bytes()
    buf.Reset()
    fmt.Println(byteQuads) // << [77 255 129 3 1 1 7 82...]
    // or
    fmt.Println(string(byteQuads[:])) // << M��...


    // deserialize
    var myStruct MyStruct
    reader := bytes.NewReader(byteQuads)
    dec := gob.NewDecoder(reader)
    err = dec.Decode(&myStruct)
    if err != nil {
        log.Fatal(err)
    }
    fmt.Println(myStruct.Value)
}

CodePudding user response：

You can use constructor syntax with slices. Lets show an example:

array := []int{1, 2, 3}

Equivalent in python is:

array = [1, 2, 3]