console tic tac toe

console-log-tic-tac-toe.js

// tic tac toe
// paste into console, type play(x,y) to take turn
// ex: play(2,2) plays bottom right corner tile

const boardInit = () => [[null, null, null],[null, null, null],[null,null,null]]
const players = ['o', 'x']
let board = boardInit()
let currentPlayerIndex = 0;
const currentPlayer = () => players[currentPlayerIndex]
const nextPlayer = () => currentPlayerIndex = +!currentPlayerIndex
const winningCombo = () => Array(3).fill(currentPlayer()).join('')
const play = (x,y) => {
  console.log(`${currentPlayer()} plays ${x}, ${y}`)
  if(board[y][x] !== null) {
    console.log(`tile already played`)
    console.log(`still ${currentPlayer()}'s turn`)
    return
  }
  board[y][x] = currentPlayer()
  checkWin()
  nextPlayer()
  console.table(board)
}
const checkWin = () => {
  const checkVert = () => board.forEach(row => {
    if(row.join('') === winningCombo()) win()
  })
  const checkHoriz = () => {
    for(let x = 0; x < 3; x++) {
      let col = [];
      for(let y = 0; y < 3; y++) {
        col.push(board[y][x])
      }
      if(col.join('') === winningCombo()) win()
    }
  }
  const checkDiag = () => {
    [
      [board[0][0], board[1][1], board[2][2]],
      [board[0][2], board[1][1], board[2][0]]
    ].forEach(diag => {
      if(diag.join('') === winningCombo()) win()
    })
  }
  checkVert();
  checkHoriz();
  checkDiag();
}

const win = (piece) => {
  console.table(board)
  console.log(`${currentPlayer()} wins!`)
  board = boardInit()
}