Method getCell

ch5-game-of-life/gol.js:11–17

(x, y)

  }

  getCell(x, y) {
    const size = this.size;
    const sizeM1 = size - 1;
    x = x < 0 ? sizeM1 : x > sizeM1 ? 0 : x;
    y = y < 0 ? sizeM1 : y > sizeM1 ? 0 : y;
    return this.cells[size * x + y];
  }

  static NEIGHBORS = [ // <1>
    [-1, -1], [-1, 0], [-1, 1], [0, -1], [0, 1], [1, -1], [1, 0], [1, 1]