Go language function to dump a byte slice in hexadecimal and ASCII

sliceDump.go

func dumpByteSlice(b []byte) {
	var a [16]byte
	n := (len(b) + 15) &^ 15
	for i := 0; i < n; i++ {
		if i%16 == 0 {
			fmt.Printf("%4d", i)
		}
		if i%8 == 0 {
			fmt.Print(" ")
		}
		if i < len(b) {
			fmt.Printf(" %02X", b[i])
		} else {
			fmt.Print("   ")
		}
		if i >= len(b) {
			a[i%16] = ' '
		} else if b[i] < 32 || b[i] > 126 {
			a[i%16] = '.'
		} else {
			a[i%16] = b[i]
		}
		if i%16 == 15 {
			fmt.Printf("  %s\n", string(a[:]))
		}
	}
}

The instruction

dumpByteSlice([]byte{10, 2, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80})

will print the following to stdOut

   0  0A 02 40 41 42 43 44 45  46 47 48 49 4A 4B 4C 4D  ..@ABCDEFGHIJKLM
  16  4E 4F 50                                          NOP