A Tour of Go: Slices exercise answer , added a factorial for a better picture

slices.go

package main

import "code.google.com/p/go-tour/pic"

func Fact(x uint8) uint8 {
    if x>1 {
      return x * (x-1)
    }    
	return x+1
}

func Pic(dx, dy int) [][]uint8 {
    res := make([][]uint8,dy,dy)
    for y:= range res {
        res[y] = make([]uint8,dx,dx)
        for x := range res[y] {
        	res[y][x] = uint8(x)*Fact(uint8(y))
        }
    }
    return res
}

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