怎么去除数组最后的空括号

Question

react我前端处理excal表格数据之后发给后端，但是发过去的表格数据里有很多空括号
如图

然后我发现原因在于我处理完的数据，excal表格中的下拉框出现在数据里了，如图

现在要怎么样去除最后的空括号？
代码如下
读取excal

export default ({ setList, disabled }) => {
    function beforeUpload(file) {
        if (typeof file.name === 'string' && file.name.indexOf('xlsx') > -1) {
            read(file);
        } else {
            message.error('请上传xlsx文件，建议下载模板');
        }
        return false;
    }
    // 读文件
    function read(file) {
        const reader = new FileReader();
        reader.onload = e => {
            const data = new Uint8Array(e.target.result);
            const workbook = XLSX.read(data, {
                type: 'array'
            });
            const firstSheetName = workbook.SheetNames[0];
            const sheet = workbook.Sheets[firstSheetName];
            const res = XLSX.utils.sheet_to_json(sheet);
            console.log('json: ', res);
            setList(res);
        }
        reader.readAsArrayBuffer(file);
    }
    return (
        <Upload
            beforeUpload={beforeUpload}
            showUploadList={false}
        >
            <Button type='primary' disabled={disabled} size='small'>导入</Button>
        </Upload>
    )
}

数据处理如下

useEffect(() => {

    if (addDataList.length > 0) {
      const newList = []
      addDataList.forEach(item => {
        let text = item['污染物类型'];
        if (text === '船舶垃圾') text = '0';
        if (text === '生活污水') text = '1';
        if (text === '含油污水') text = '2';
        let text2 = item['作业方式'];
        if (text2 === '垃圾自转运至处置') text2 = '0';
        if (text2 === '污水经管道运输至处置设备') text2 = '1';
        if (text2 === '补录接收') text2 = '2';
        if (text2 === '智能设备接收') text2 = '3';
        if (text2 === '扫车船码接收') text2 = '4';
        if (text2 === '扫码设备接收') text2 = '5';
        if (text2 === '预约接收') text2 = '6';
        if (text2 === '上岸即处理') text2 = '7';
        let text3 = item['转运状态'];
        if (text3 === '已转运') text3 = '0';
        if (text3 === '未转运') text3 = '1';
        if (text3 === '待受理') text3 = '2';
        if (text3 === '待确认') text3 = '4';
        newList.push({
          receiveNumbers: item['单号'],
          shipName: item['船名'],
          type: text,
          quantity: item['数量'],
          receiveCompany: item['接收单位'],
          taskCompany: item['作业单位'],
          taskTime: item['接收开始时间'],
          taskMode: text2,
          state: text3
        })
      })
      updateDetails({
        data: {
          status: '1',
          list: [...newList],
        }
      }).then(res => {
        if (res.code === '0') {

        }
      })
    }
  }, [addDataList]);

Answer 1

filter过滤 一下

 let arr=[{a:1},{},{}];
  let v=arr.filter((item)=>{
     return  JSON.stringify(item)!="{}";
  });
  console.log(v)