sort stock

/**
 * Sort articles by highest stock balance. If two articles have same stock, sort by newest date
 * @param {JSON-Array} inputArray - JSON-Array to be sorted
 * @return {JSON-Array}           - Sorted JSON-array
 */
function get_sorted_articles(inputArray){

    // Making deep copy of inputArray, so to not mutate it
    let sortedArray = JSON.parse(JSON.stringify(inputArray));

    // Sort the array by highest stock balance, or by newest date if same balance
    sortedArray.sort(function(a, b) {
        // First compare stock balance. If it returns 0 (same balance), then compare date
        return b["inventory"] - a["inventory"] || new Date(b["creation_date"]) - new Date (a["creation_date"]);
    });

    return sortedArray;
}