db001

function cavityMap(grid) {
    // Turn grid into a 2D array
    const twoDArr = grid.map(ele => ele.split(''));
    
    // Loop through 2D array checking values against neighbours
    for(let i = 1; i < twoDArr.length - 1; i++) {
        for(let j = 1; j < twoDArr[i].length - 1; j++) {
            if(horizontalCheck(twoDArr, i, j) && verticalCheck(twoDArr, i, j)) {
              twoDArr[i][j] = 'X'; 
            }