这是密码-

接口-

interface IWEXInterface {
  readonly Date?: string;
  "Exec Qty"?: string;
  readonly Expiry?: string;
}

资料-

let data: IWEXInterface[] = [
        {
          Date: "8/30/2021",
          "Exec Qty": "13",
          Expiry: "17/09/2021",
        },
        {
          Date: "8/30/2021",
          "Exec Qty": "15",
          Expiry: "17/09/2021",
        },
        {
          Date: "8/30/2021",
          "Exec Qty": "13",
          Expiry: "17/09/2021",
        },
      ];

对对象求和并分组-

      const sums = [
        ...data
          .reduce((map, item) => {
            const { Date: key, "Exec Qty": qty } = item;
            const prev: IWEXInterface = map.get(key);

            if (prev) {
              prev["Exec Qty"]! += Number(qty);
            } else {
              map.set(key, Object.assign({}, item));
            }

            return map;
          }, new Map())
          .values(),
      ];

      console.log(sums);

输出-

[ { Date: '8/30/2021', 'Exec Qty': '131513', Expiry: '17/09/2021' } ]

我怎样才能将字符串转换为数字。

想要的产出-

 [ { Date: '8/30/2021', 'Exec Qty': 41, Expiry: '17/09/2021' } ]

.............................................................................................................