board.map not a function line 77

minesweeper.js

const generatePlayerBoard = (numberOfRows, numberOfColumns) => {
  const board = [];

  for (let i = 0; i < numberOfRows; i++) {
    const row = [];
    for (let j = 0; j < numberOfColumns; j++) {
      row.push(' ');
    } 
    board.push(row);
  }

  return board;
};

const generateBombBoard = (numberOfRows, numberOfColumns, numberOfBombs) => {
  const board = [];

  for (let i = 0; i < numberOfRows; i++) {
    const row = [];
    for (let j = 0; j < numberOfColumns; j++) {
      row.push(null);
    } 
    board.push(row);
  }

  let numberOfBombsPlaced = 0;

  while (numberOfBombsPlaced < numberOfBombs) {
    const randomRowIndex = Math.floor(Math.random() * numberOfRows);
    const randomColumnIndex = Math.floor(Math.random() * numberOfColumns);
    if (board[randomRowIndex][randomColumnIndex] !== 'B') {
      board[randomRowIndex][randomColumnIndex] = 'B';
      numberOfBombsPlaced++;
    }
  }

  return board;
};

const getNumberOfNeighborBombs = (bombBoard, rowIndex, columnIndex) => {
  const neighborOffsets = [
    [-1, -1],
    [-1, 0],
    [-1, 1],
    [0, -1],
    [0, 1],
    [1, -1],
    [1, 0],
    [1, 1]
  ];
  const numberOfRows = bombBoard.length;
  const numberOfColumns = bombBoard[0].length;

  let numberOfBombs = 0;

  neighborOffsets.forEach(offset => {
    const neighborRowIndex = rowIndex + offset[0];
    const neighborColumnIndex = columnIndex + offset[1];
    if (neighborRowIndex >= 0 && neighborRowIndex < numberOfRows && neighborColumnIndex >= 0 && neighborColumnIndex < numberOfColumns) {
      if (bombBoard[neighborRowIndex][neighborColumnIndex] === 'B') {
        numberOfBombs++;
      }
    }
  });

  return numberOfBombs;
};

const flipTile = (playerBoard, bombBoard, rowIndex, columnIndex) => {
  if (playerBoard[rowIndex][columnIndex] !== ' ') {
    console.log('This tile has already been flipped!');
    return;
    } else if (bombBoard[rowIndex][columnIndex] === 'B') {
      playerBoard[rowIndex][columnIndex] = 'B';
    } else {
      playerBoard[rowIndex][columnIndex] = getNumberOfNeighborBombs(bombBoard, rowIndex, columnIndex);
    }
  };

const printBoard = board => {
  console.log(board.map(row => row.join(' | ')).join('\n'));
};

let playerBoard = generatePlayerBoard(3, 3);
let bombBoard = generateBombBoard(3, 3, 3);

console.log('Player Board: ');
printBoard(playerBoard);
console.log('Bomb Board: ');
printBoard(bombBoard);
console.log('Number of bombs touch tile');
printBoard(getNumberOfNeighborBombs(bombBoard, 0, 0))

// console.log('Player Board: ')
// printBoard(playerBoard);
// 
// console.log('Bomb Board: ');
// printBoard(bombBoard);
// 
// flipTile(playerBoard, bombBoard, 0, 0);
// console.log('Updated Player Board: ');
// printBoard(playerBoard)