Creates a minesweeper board that has the ability to randomly plant mines on cells

realtyshares-minesweeper.js

// sets up Board class
var Board = function(dimension, mines) {
  this.board = [];
  for(var i = 0; i < dimension; i++) {
    var row = [];
    for(var j = 0; j < dimension; j++) {
      row.push(new Cell(false));
    }
    this.board.push(row);
  }
  console.log('Generated a board of dimensions ' + dimension + ' by ' + dimension); 
  this.plantMines(dimension,mines); 
};

// retrieves board 2D array
Board.prototype.getBoard = function() {
    return this.board;
};

// plants mines randomly on board
Board.prototype.plantMines = function(dimension,mines) {
  var maxMines = dimension * dimension;
  if( mines < maxMines ) {
    var minesPlanted = 0;
    while(minesPlanted < mines) {
      var x = generateRandNumber(dimension),
          y = generateRandNumber(dimension);
      if(!this.board[x][y].hasMine) {
        this.board[x][y].setMine(true);
        minesPlanted++;
      }
    }
    console.log('There are ' + this.countMines() + ' mines on your board!');
  } else {
    throw new Error('You have too many mines! The number of mines must be fewer than ' + maxMines + '.');
  }

};

// checks the number of mines on your board instance
Board.prototype.countMines = function() {
  var count = 0,
      i,
      j,
      row,
      cell;
  
  for(i = 0; i < this.board.length; i++) {
    row = this.board[i];
    for(j = 0; j < row.length; j++) {
      cell = row[j];
      if(cell.hasMine){
        count++;
      }
    }
  }
  
  return count;
};

// sets up Cell class, with only hasMine property
var Cell = function(val) {
    this.hasMine = val;
};


Cell.prototype.setMine = function(val) {
  if(typeof val === 'boolean') {
    this.hasMine = val;  
  } else {
    throw new Error('Expected a boolean input but received a ' + typeof val + ' input instead.' ) 
  }
};

// for checking whether the cell has a mine 
Cell.prototype.getMineValue = function() {
  return this.hasMine;
};

// generates random number up to max
var generateRandNumber = function(max) {
  return Math.floor(Math.random() * max);  
};

// sets the dimension and number of mines to be placed on the board
var dimension = 10; 
var mines = 10;
// instantiates a board
var board = new Board(dimension,mines);
console.log(board.getBoard());