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排除字符串里某字符第3次出现后面的所有字符,代码如何写

WBOY
WBOYOriginal
2016-06-13 12:38:52846browse

排除字符串里某字符第3次出现后面的所有字符,代码怎么写
排除字符串里某字符第3次出现后面的所有字符,代码怎么写

比如字符串“2你好2哈哈2对的啊哈哈哈”

就是排除第3个2后面的所有字符得到结果“2你好2哈哈2"

请知道的大哥直接给代码好吗谢谢了 

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