Split array data

list.ts

  splitToShowData() {
    this.dataTableShow$ = from([]);
    const paths = _.chunk(this.dataTable, 25);
    let list = [];
    if (paths && paths.length) {
      this.layoutService.isShowLoadingBar.next(true);
      this.dataTableShow$ = from(paths[0]);
      this.dataTableShow$ = interval(300).take(paths.length).map((i) => {
        if (i == 0) {
          list = [];
        }
        list = list.concat(paths[i]);
        if (i == paths.length - 1) {
          setTimeout(() => {
            this.layoutService.isShowLoadingBar.next(false);
          }, 1000);
        }
        return list;
      });
    }
  }