Solution to `Slices Exercise` in `A Tour of Go` tutorial.

a-tour-of-go-exercise-slices.go

package main

import "golang.org/x/tour/pic"

func Pic(dx, dy int) [][]uint8 {
	canvas := make([][]uint8, dy)
	
	for y := 0; y < dy; y ++ {
		canvas[y] = make([]uint8, dx)
	}
	
	for y := 0; y < dy; y ++ {
		for x := 0; x < dx; x ++ {
			canvas[y][x] = uint8(x) * uint8(y)
		}
	}
	return canvas
}

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