Code Signal matrixElementsSum Solution in JS

matrixElementsSum.js

function solution(matrix) {
    const hauntedRoom = {};
    const numberOfFloors = matrix.length;
    const numberOfRooms = matrix[0].length;
    let total = 0;
    
    // 1. Loop through each row
    for (let floor = 0; floor < numberOfFloors; floor++) {
    // 2. For each element in the row
        for (let room = 0; room < numberOfRooms; room++) {
            if (matrix[floor][room] === 0) {
                if (room in hauntedRoom) {
                    hauntedRoom[room]++;
                } else {
                    hauntedRoom[room] = 1;
                }
            } else {
                if (!(room in hauntedRoom)) {
                    total += matrix[floor][room];
                }
            }
        }
    }
    // 3. If the column is a no no skip
    // 4. If the element is haunted and not already noted add to the no no group
    // 5. Else add the cost to the total
    // 6. Return the total
    return total;
}