typescript 数组根据指定字段去重

this.listDataIn = data.Result.data;
 const uniqueItems: Item[] = Array.from(
          new Set(this.listDataIn.map(item => item.MyLandID))
        ).map(id => {
          return obj.listDataIn.find(item => item.MyLandID === id);
        });
        obj.listt = uniqueItems;
        console.log(uniqueItems);