PachVerb

let isArray = (arr) => arr instanceof Array;

function flaten(arr) {
  if (arr.length === 0) return arr;
  // 1. 分解：先找数组

  if (isArray(arr)) {
    arr.forEach((val) => {
      flaten(val);
    });

PachVerb

* note:  From a reasonable point of view.This method only works with members of the JS base datatype -number. 
Include sheet but not limited to other types, can also be used. Whether reasonable, please consider。


// single quotes
const seqarr = (arr) => "'" + arr.join("','") + "'";

// test func
seqarr([1, 2, 3]) // -> "'1', '2', '3'";

PachVerb

/*
** 时间戳转换成指定格式日期
** eg. 
** dateFormat(11111111111111, 'Y年m月d日 H时i分')
** → "2322年02月06日 03时45分"
*/
var dateFormat = function (timestamp, formats) {
    // formats格式包括
    // 1. Y-m-d
    // 2. Y-m-d H:i:s