02. Air Pollution js exam

function solve(mapInfo, affectingForces) {

    let mapOfSofia = mapInfo.map(number => number.split(' ').map(Number))

    while (affectingForces.length > 0) {
        let currentArr = affectingForces.shift()
        let currentForce = currentArr.split(' ')[0]
        let currentValue = Number(currentArr.split(' ')[1])

        switch (currentForce) {
            case 'breeze':
                mapOfSofia = breeze(mapOfSofia, currentValue)
                break;
            case 'gale':
                mapOfSofia = gale(mapOfSofia, currentValue)
                break;
            case 'smog':
                mapOfSofia = smog(mapOfSofia, currentValue)
                break;
            default:
                break;
        }
    }

    function breeze(arr, index) {
        for (let col = 0; col < arr.length; col++) {
            let currentParticle = arr[index][col];
            if (currentParticle - 15 >= 0) {
                arr[index][col] -= 15
            } else {
                arr[index][col] = 0
            }
        }
        return arr
    }

    function gale(arr, index) {
        for (let row = 0; row < arr.length; row++) {
            let currentParticle = arr[row][index];
            if (currentParticle - 20 >= 0) {
                arr[row][index] -= 20;
            } else {
                arr[row][index] = 0;
            }
        }
        return arr
    }

    function smog(arr, value) {
        for (let row = 0; row < arr.length; row++) {
            for (let col = 0; col < arr.length; col++) {
                arr[row][col] += value;
            }
        }
        return arr
    }

    let result = 'Polluted areas: '

    mapOfSofia.forEach((line, rowIndex) => {
        line.forEach((number, colIndex) => {
        if (number >= 50) {
            return (result += `[${rowIndex}-${colIndex}], `);
        }
        });
    });

    console.log(result === 'Polluted areas: ' ? result = 'No polluted areas' : result.slice(0, -2))

}