[go] Convert an integer to a byte array

I have a function which receives a []byte but I what I have is an int, what is the best way to go about this conversion?

err = a.Write([]byte(myInt))

I guess I could go the long way and get it into a string and put that into bytes, but it sounds ugly and I guess there are better ways to do it.

What's wrong with converting it to a string?

[]byte(fmt.Sprintf("%d", myint))

Check out the "encoding/binary" package. Particularly the Read and Write functions:

binary.Write(a, binary.LittleEndian, myInt)

Sorry, this might be a bit late. But I think I found a better implementation on the go docs.

buf := new(bytes.Buffer)
var num uint16 = 1234
err := binary.Write(buf, binary.LittleEndian, num)
if err != nil {
    fmt.Println("binary.Write failed:", err)
}
fmt.Printf("% x", buf.Bytes())

Adding this option for dealing with basic uint8 to byte[] conversion

foo := 255 // 1 - 255
ufoo := uint16(foo) 
far := []byte{0,0}
binary.LittleEndian.PutUint16(far, ufoo)
bar := int(far[0]) // back to int
fmt.Println("foo, far, bar : ",foo,far,bar)

output : foo, far, bar : 255 [255 0] 255