Tic Tac Toe CLI MM

index.js

// A simple Tic-Tac-Toe game implmented in javascript


/** 
// function takes input in format [4,0,1,3,7]

// output is either winner, incomplete, draw

// Max number of inputs that can be given are 9

//  9 boxes

// 2 users are going to play this game
*/

function ticTacToe(input) {
  // possible patterns
  const possibleWinnerPatterns = [
    [0, 1, 2],
    [3, 4, 5],
    [6, 7, 8],
    [0, 3, 6],
    [1, 4, 7],
    [2, 5, 8],
    [0, 4, 8],
    [2, 4, 6],
  ];

  //  For loop over the all the inputs to get inputs X and O inputs
  let xInputs = [],
    oInputs = [];
  for (let i = 0; i < input.length; i++) {
    if (i % 2 === 0) {
      xInputs.push(input[i]);
    } else {
      oInputs.push(input[i]);
    }
  }

  for (let j = 0; j < possibleWinnerPatterns.length; j++) {
    if (possibleWinnerPatterns[j].every((move) => xInputs.includes(move))) {
      console.log('X is the winner');
      return;
    } else if (
      possibleWinnerPatterns[j].every((move) => oInputs.includes(move))
    ) {
      console.log('O is the winner');
      return;
    }
  }
  console.log('Draw');
}

// Different test cases

ticTacToe([0, 4, 2, 1, 8, 7]); // O is the winner
// ticTacToe([2, 8, 4, 0, 1, 3]); //Draw case
// ticTacToe([2, 1, 4, 3, 7, 6, 9, 8]); //Draw case
// ticTacToe([0, 1, 2, 3, 4, 5, 6, 7, 8]); // X is the winner