字符串反转
![](https://images0.cnblogs.com/blog/486341/201502/271523169087062.png)
上面那个字符串反转不太好,用了string的内部函数
![](https://images0.cnblogs.com/blog/486341/201503/021024374418517.png)
![](https://images0.cnblogs.com/blog/486341/201503/021024374418517.png)
一个字符串转驼峰式写法 ,例如:border-bottom-color ->borderBottomColor
![](https://images0.cnblogs.com/blog/486341/201503/021027205045967.png)
查找字符串中出现最多的字符和次数,例如:aaabbbbbcc ->b 最多出现,出现了5次
![](https://images0.cnblogs.com/blog/486341/201503/021042108166405.png)
给字符串加千字符,例如:123456789.00 -> 123,456,789.00
![](https://images0.cnblogs.com/blog/486341/201503/021245326137515.png)
正则
![](https://images0.cnblogs.com/blog/486341/201503/021247491459770.png)
![](https://images0.cnblogs.com/blog/486341/201503/021027205045967.png)
查找字符串中出现最多的字符和次数,例如:aaabbbbbcc ->b 最多出现,出现了5次
![](https://images0.cnblogs.com/blog/486341/201503/021042108166405.png)
给字符串加千字符,例如:123456789.00 -> 123,456,789.00
![](https://images0.cnblogs.com/blog/486341/201503/021245326137515.png)
正则
![](https://images0.cnblogs.com/blog/486341/201503/021247491459770.png)