JS中常用开发知识点
1、获取指定范围内的随机数
![](https://img2018.cnblogs.com/blog/1462173/201812/1462173-20181218193707793-1392964849.png)
2、随机获取数组中的元素
![](https://img2018.cnblogs.com/blog/1462173/201812/1462173-20181218193741051-1395115006.png)
3、生成从0到指定值的数字数组
![](https://img2018.cnblogs.com/blog/1462173/201812/1462173-20181218193823175-607193494.png)
等同于:
![](https://img2018.cnblogs.com/blog/1462173/201812/1462173-20181218193911613-154066904.png)
4、打乱数字数组的顺序
![](https://img2018.cnblogs.com/blog/1462173/201812/1462173-20181218193950284-1247523812.png)
5、对象转换为数组
//注意对象必须是以下格式的才可以通过此方式转化为数组
//获取的DOM集合,以及函数的arguments也可以通过此方式转化为数组
![](https://img2018.cnblogs.com/blog/1462173/201812/1462173-20181218194038541-1809383303.png)
6、验证是否为数组
![](https://img2018.cnblogs.com/blog/1462173/201812/1462173-20181218194103327-1774710003.png)
7、获取数组中最大或者最小值
![](https://img2018.cnblogs.com/blog/1462173/201812/1462173-20181218194214314-1796278744.png)
8、清空数组
![](https://img2018.cnblogs.com/blog/1462173/201812/1462173-20181218194249100-739719096.png)
9、保留指定小数位
![](https://img2018.cnblogs.com/blog/1462173/201812/1462173-20181218194314436-1751392248.png)
10、生成指定长度的随机字母数字字符串
![](https://img2018.cnblogs.com/blog/1462173/201812/1462173-20181218194427098-155065802.png)
11、找出数组中出现次数最的元素,并给出其出现过的位置
![](https://img2018.cnblogs.com/blog/1462173/201812/1462173-20181218194621122-2146610165.png)