code: function fillCircleArrayRowToMiddle(array, x, y) {
    let i;
    const radius = Math.floor(array.length / 2);
    if (x >= radius) {
      for (i = radius; i < x; i++) {
        array[i][y] = true;
      }
    } else if (x < radius) {
      for (i = x + 1; i < radius; i++) {
        array[i][y] = true;
      }
    }
  }
docs: This method fills a row in the array from the given coordinate to the
  middle with `true`.
  @param {Array<Array<(boolean|undefined)>>} array The array that will be altered.
  @param {number} x X coordinate.
  @param {number} y Y coordinate.