Remove Null from an Object and Sort object by key

有一物件中存有Null時，我們希望清除並重新排序

let Obj99 = {
        qq99: null,
        w995: 54,
        qq98: 0,
        qq497: 1,
        c992: 168
    }

利用!判斷是否為Null，如果是的話就刪除

接著Sort by Key

function Obj_remove_Null(obj) {
        for (let null_element in obj) {
            if (!obj[null_element])
                //delete null
                console.log("null_element", null_element)
            {
                delete (obj[null_element])
            }
            return (
                (
                    //Sort JavaScript object by key
                    Object.keys(obj).sort().reduce((r, k) => (r[k] = obj[k], r), {})
                )
            )
        }
    }
console.log("Obj_remove_Null",Obj_remove_Null(Obj99));