Tour of Go 2.0

Slices of slices

Slices can hold any type — including other slices. That gives you a 2D slice, which is handy for grids, tables, or boards.

The example builds a tic-tac-toe board as a [][]string. Each row is its own slice.

Try it: Finish the game — add a few more moves and see what the board looks like.

main.go ▶ Run in Playground 
package main

import (
	"fmt"
	"strings"
)

func main() {
	// Create a tic-tac-toe board.
	board := [][]string{
		[]string{"_", "_", "_"},
		[]string{"_", "_", "_"},
		[]string{"_", "_", "_"},
	}

	// The players take turns.
	board[0][0] = "X"
	board[2][2] = "O"
	board[1][2] = "X"
	board[1][0] = "O"
	board[0][2] = "X"

	for i := 0; i < len(board); i++ {
		fmt.Printf("%s\n", strings.Join(board[i], " "))
	}
}