我有這個 json 響應(yīng)：id: 30tableName: "UserCredit"keyValues: "{"Id":39}"oldValues: "{"CoinLastUpdate":"2020-02-18T14:18:13.5155426+00:00","ScoreLastUpdate":"2020-02-18T14:18:13.5155429+00:00"}"newValues: "{"CoinLastUpdate":"2020-02-18T14:18:15.7325823+00:00","ScoreLastUpdate":"2020-02-18T14:18:15.7325826+00:00"}"auditType: "Update"createdOnUtc: "2020-02-18T14:18:15.7338989Z"createdByRefId: 39我想找出兩者之間的區(qū)別oldValues，newValues然后我編寫以下代碼：setOldNewValue(item: DeiffrentModel): void {let oldValue;let newValue;console.log(item.oldValues)if (item.newValues !== null) {  newValue = item.newValues.split(',');}if (item.oldValues !== null) {  oldValue = item.oldValues.split(',');}for (let index = 0; index < newValue.length; index++) {  let addModel = {} as DeifferModel;  addModel.field = 'id';  addModel.newValue = newValue[index];  console.log(oldValue)  if (oldValue !== undefined) {    addModel.oldValue = oldValue[index]  }  this.differModel.push(addModel);}this.findDiffrent = _.difference(newValue, oldValue);}現(xiàn)在我有這個問題：**** 我創(chuàng)建了一個值數(shù)組newValue，oldValue但它顯示如下：0：“CoinLastUpdate”：“2020-02-18T14:18:13.5155426+00:00”1: "ScoreLastUpdate":"2020-02-18T14:18:13.5155429+00:00"}但我只需要2020-02-18T14:18:13.5155429+00:00我怎么解決這個問題？