function cleanObject(obj) {

    // Base case for non-objects or null

    if (obj === null || typeof obj !== 'object') {

        return obj;

    }

​

    // For arrays, map through and clean each element

    if (Array.isArray(obj)) {

        return obj.map(value => cleanObject(value)).filter(value => value !== undefined);

    }

​

    // For objects, remove keys with undefined or null values

    const cleanedObj = {};

    for (const [key, value] of Object.entries(obj)) {

        if (value !== undefined && value !== null) {

            cleanedObj[key] = cleanObject(value);  // Recurse into the value

        }

    }

​

    return cleanedObj;

}