ticTacToe

ticTacToe = arr => {
  'use-strict'

  let dashBoard = [[false, false, false],
  [false, false, false],
  [false, false, false],]

  const isWinning = char => {
    let leftDiagonal = dashBoard[0][0] + dashBoard[1][1] + dashBoard[2][2]
    let rightDiagonal = dashBoard[0][2] + dashBoard[1][1] + dashBoard[2][0]
    if (char.repeat(3) === leftDiagonal || char.repeat(3) === rightDiagonal)
      return true
    for (let i = 0; i < 3; i++) {
      let horizontal = dashBoard[i].reduce((a, c) => a + c, '')
      let vertical = dashBoard
        .map((x) => x[i])
        .reduce((a, c) => a + c, '')
      if (char.repeat(3) === horizontal || char.repeat(3) === vertical)
        return true
    }
    return false
  }

  let flag = true
  let count = 0

  for (const el of arr) {
    let [row, col] = el.split(' ')

    if (dashBoard[row][col] === 'X' || dashBoard[row][col] === 'O')
      console.log('This place is already taken. Please choose another!')
    else {
      if (flag) {
        flag = false
        dashBoard[row][col] = 'X'
        if (isWinning('X')) {
          console.log(`Player X wins!`)
          break
        }
      }
      else {
        flag = true
        dashBoard[row][col] = 'O'
        if (isWinning('O')) {
          console.log(`Player O wins!`)
          break
        }
      }
      count++
      if (count === 9) {
        console.log('The game ended! Nobody wins :(')
        break
      }
    }
  }
  console.log(dashBoard.map(row => row.join('\t')).join('\n'))
}