text: /**
   * In the popular Minesweeper game you have a board with some mines and those cells
   * that don't contain a mine have a number in it that indicates the total number of mines
   * in the neighboring cells. Starting off with some arrangement of mines
   * we want to create a Minesweeper game setup.
   *
   * @param {Array<Array>} matrix
   * @return {Array<Array>}
   *
   * @example
   * matrix = [
   *  [true, false, false],
   *  [false, true, false],
   *  [false, false, false]
   * ]
   *
   * The result should be following:
   * [
   *  [1, 2, 1],
   *  [2, 1, 1],
   *  [1, 1, 1]
   * ]
   */
  function minesweeper(matrix) {
    const result = [];
    matrix.forEach((row, index, arr) => {
      const resultRow = [];
      row.forEach((item, i, arr2) => {
        let n = 0;
        if (arr2[i - 1]) {
          n++;
        } if (arr2[i + 1]) {
          n++;
        } if (arr[index - 1]) {
          if (arr[index - 1][i]) {
            n++;
          } if (arr[index - 1][i - 1]) {
            n++;
          } if (arr[index - 1][i + 1]) {
            n++;
          }
        } if (arr[index + 1]) {
          if (arr[index + 1][i]) {
            n++;
          } if (arr[index + 1][i - 1]) {
            n++;
          } if (arr[index + 1][i + 1]) {
            n++;
          }
        }
        resultRow.push(n);
      });
      result.push(resultRow);
    });
    return result;
  }
  
  module.exports = minesweeper;
  