vue function

判断实体对象是否为空

Object.keys(object).length === 0;//如果实体对象是 let object={},则返回为0 反之 let object = {a:'1'},则返回1,结果以object的属性count为准

导出数据生成excel

//需要引用 
import * as XLSX from "xlsx";
import { saveAs } from "file-saver";
exptDiffData() {
     if (!this.data|| this.data.length == 0) {
        this.$message.error("没有数据导出!");
        return;
      }
      // 将数据转换为工作表
      const worksheet = XLSX.utils.json_to_sheet(this.grdSurData);

      // 创建工作簿并添加工作表
      const workbook = XLSX.utils.book_new();
      XLSX.utils.book_append_sheet(workbook, worksheet, "Sheet1");

      // 生成Excel文件
      const excelBuffer = XLSX.write(workbook, { bookType: "xls", type: "array" });

      // 使用blob和FileReader创建一个URL然后下载
      const dataBlob = new Blob([excelBuffer], { type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=UTF-8" });
      saveAs(dataBlob, "myExcel.xls");
      this.$message.success("保存成功");
    }

以时间生成一个字符串

    formatDateTime() {
      let date = new Date();
      const year = date.getFullYear();
      const month = this.padZero(date.getMonth() + 1);
      const day = this.padZero(date.getDate());
      const hours = this.padZero(date.getHours());
      const minutes = this.padZero(date.getMinutes());
      const seconds = this.padZero(date.getSeconds());

      return `${year}${month}${day}${hours}${minutes}${seconds}`;
    },

取数组中重复的数据(复杂数组)

    getRepeatData(data) {
      let columnName="你要查重的属性";
      let nameCount = data.reduce((acc, curr) => {
        acc[curr[columnName]] = (acc[curr[columnName]] || 0) + 1;
        return acc;
      }, {});

      // 获取重复的 name
      return Object.keys(nameCount).filter((name) => nameCount[name] > 1);
    },