Sun-Y0n9

```javascript var str1 = '红蓝蓝黄红黄蓝红红黄红'; let obj1 = [...str1].reduce((total, item) => { item in total ? total[item]++ : total[item] = 1 return total }, {}); let str2 = new Array(obj1.黄).fill('黄').concat(new...

```javascript var str1 = '红蓝蓝黄红黄蓝红红黄红'; var rule = { '黄' : 0, '红' : 1, '蓝' : 2 }; let str3 = [...str1].sort((a, b) => rule[a] - rule[b]).join(''); console.log(str3); //...

```javascript // 如 2015-2-8 到 2015-3-3 返回【2015-2-8 2015-2-9...】 function rangeTime (start, end) { start = start.replace('-','/'); end = end.replace('-','/'); var ret = []; var setp = 24 * 3600 *...