learngo slices solutions (#60)

gistfile1.go

package main

import "tour/pic"

func Pic(dx, dy int) [][]uint8 {

  outer := make([][]uint8, dy)
  for i := 0; i < dy; i++ {
    inner := make([]uint8, dx)
    for j := 0; j < dx; j++ {
      inner[j] = uint8((j^i)-1)
    }
    outer[i] = inner
  }
  
  return outer
}

func main() {
	pic.Show(Pic)
}