如何将字节数组转换为io。 流并将其转换回字节数组？

Question

func main(){    
bytearray:=[]byte{"data"}
reader := bytes.NewReader(stdout.Bytes())
transfer(reader)
}

Function 2
func transfer(reader *Reader){
bytearray:= //How do I get the original byte array?
}

Basically I want to send byte array from one function to another using readers or writers

Answer 1

bytes.Buffer is what you need. It can convert a byte slice to an io.Reader/io.Writer:

buf := bytes.NewBuffer([]bytes{...})

And to read from an io.Reader into a byte slice:

s, err := ioutil.ReadAll(r)

Converting to/from byte arrays is left as a trivial exercise for the reader.