2D slices in Go

slices.go

package main

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

func Pic(dx, dy int) [][]uint8 {
	r := make([][]uint8, dy)
	for y := range r {
		r[y] = make([]uint8, dx)
		for x := range r[y] {
			// different functions to generate the “picture”
			r[y][x] = uint8((x + y) / 2)
			r[y][x] = uint8(x * y)
			r[y][x] = uint8(x ^ y)
		}
	}
	return r
}

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