jovey-zheng

/**
 * @param a {String}
 * @param b {String}
 */
function sumBigNumber(a, b) {
    if (typeof a !== 'string' || typeof b !== 'string') {
        throw new Error('param 'a' and 'b' must be string')
    }
    
    var res = '',

jovey-zheng

// array flatten function
function flatten (arr) {
	let result = [].slice.call(arguments)[1] || []

	for (let i = 0; i < arr.length; i++) {
		if (Array.isArray(arr[i])) {
		    flatten(arr[i], result)
		} else {
		    result.push(arr[i])
		}

jovey-zheng

syncApply ({timeout, fn, args = [], scope = this}) {
  return new Promise((resolve, reject) => {
    try {
      setTimeout(() => {
        resolve(fn.apply(scope, args))
      }, timeout)
    } catch (err) {
      reject(err)
    }
  })

jovey-zheng

function getElementTop(elem) {
　　var elemTop = elem.offsetTop;
　　elem = elem.offsetParent;

　　while (elem != null) {
　　　　elemTop += elem.offsetTop;
　　　　elem = elem.offsetParent;
　　}

　　return elemTop;

jovey-zheng

// 简单的缓存工具
// 匿名函数创造了一个闭包
const cache = (function() {
  const store = {};
  
  return {
    get(key) {
      return store[key];
    },
    set(key, val) {

jovey-zheng

function isRepeat(arr){
  var hash = {};
  
  for (var item of arr) {
    if (hash[item]) {
      return true;
    } 
    hash[item] = false;
  }
  

jovey-zheng

(function(global){
  var numtoCL = {}
  var Maxnumb = 9007199254740992;

  numtoCL.toS = function(num,m){
    var op = {
        ch: '零一二三四五六七八九'
        ,ch_u: '个十百千万亿'
        ,other: '负点'
        ,toCL: this.toCL

jovey-zheng

class DateFormat {
  constructor(tmp) {
    this.tmp = +tmp || Date.now();
  }

  duration(format = 'HH:mm:ss') {
    let hour = ~~(this.tmp/1000/60/60);
    let minutes = ~~((this.tmp/1000/60)%60);
    let seconds = ~~((this.tmp/1000)%60);

jovey-zheng

function chunk(arr, chunk) {
  var res = [],
      len = arr.length,
      _len = Math.ceil(arr.length / chunk),
      _chunk = 0;
  chunk = chunk > len ? len : chunk;

  for (var i = 0; i < _len ;i++) {
    var _arr = [];

jovey-zheng

var _ = require('lodash');

module.exports = function (source, target) {
  var joinArrays = function (a, b) {
    if (_.isArray(a) && _.isArray(b)) {
      return a.concat(b);
    };
    if (_.isPlainObject(a) && _.isPlainObject(b)) {
      return _.merge(a, b, joinArrays);
    };