gra w kropki

kropki.js

createArray = (x, y, fill = 0) => {
    for (var ary = []; ary.push(Array(x).fill(fill)) < y;);
    return ary;
}
board = createArray(10, 10, 3);
display = (ary = board) => console.table(ary) // function that draws the board in the console
has4 = (ary) => ary.filter(x => x >= 4).length > 0 // Is there a 4 or more in 1 dimensional array?
Has4 = (ary = board) => ary.filter((x) => has4(x)).length > 0 // Is there a 4 or more in 2 dimensional array?
split = () => {
    let board2 = createArray(10, 10);
    for (let i = 0; i < board.length; i++) {
        for (let j = 0; j < board[0].length; j++) {
            if (board[i][j] >= 4) {
                board2[i][j] += board[i][j] - 4;
                if (typeof board2[i + 1] != 'undefined') board2[i + 1][j] += 1;
                if (typeof board2[i - 1] != 'undefined') board2[i - 1][j] += 1;
                if (typeof board2[i][j + 1] != 'undefined') board2[i][j + 1] += 1;
                if (typeof board2[i][j - 1] != 'undefined') board2[i][j - 1] += 1;
            } else {
                board2[i][j] += board[i][j];
            }
        }
    }
    board = JSON.parse(JSON.stringify(board2));
    display(board);
    if (Has4()) split();
}
move = (x, y, a = 1) => {board[x][y] += a; split()}
move(2,3,1)
display();