sortByUsedDate: function(){

        let sortedCodes = _.orderBy(this.modalPayload.discountcodes, (code) => {
            return Vue.moment(code.usedDate).format('MDYYYY');
        }, ['desc']);

        let sortedWithoutUnused = _.remove(sortedCodes, function(code) {
            return code.isBought === 1;
        });

        let unusedCodes = _.filter(this.modalPayload.discountcodes, function(code){
            return code.isBought == 0;
        });

        let final = sortedWithoutUnused.push(unusedCodes);

        return final;
    }