如何利用asp.net实现正则表达式的高效应用?
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本文共计472个文字,预计阅读时间需要2分钟。
1. 平衡组/递归匹配 (`(?\'group\')`) 将名为group的内容分组,压栈计数;(`(?-group\')`) 将名为group的内容分组,出栈计数;(`(?!\')`) 零宽度负向前瞻,指向非group的位置,实现先断言。由于没有后缀表达式,试图匹配总是失败。正则样例:`1+2*(3+4)`
1. 平衡组/递归匹配
(?'group') 将名为group对应的内容,压栈计数;
(?'-group') 将名为group的对应的内容, 出栈计数
(?!) 零宽负向先行断言,由于没有后缀表达式,试图匹配总是失败
正则样例:
,{0,1}"5":\[[^\[\]]*(((?'Open'\[)[^\[\]]*)+((?'-Open'\])[^\[\]]*)+)*(?(Open)(?!))\],{0,1}
测试数据:
{"0":["0","0-1","0-2"],"1":["1","1-1","1-2"],"2":["2","2-1","2-2"],"3":["3","3-1","3-2"],"4":["4","4-1","4-2"],"5":["5","5-1","5-2"]}
比对结果:,"1":["1","1-1","1-2"],
评语:这个写的很不错。
本文共计472个文字,预计阅读时间需要2分钟。
1. 平衡组/递归匹配 (`(?\'group\')`) 将名为group的内容分组,压栈计数;(`(?-group\')`) 将名为group的内容分组,出栈计数;(`(?!\')`) 零宽度负向前瞻,指向非group的位置,实现先断言。由于没有后缀表达式,试图匹配总是失败。正则样例:`1+2*(3+4)`
1. 平衡组/递归匹配
(?'group') 将名为group对应的内容,压栈计数;
(?'-group') 将名为group的对应的内容, 出栈计数
(?!) 零宽负向先行断言,由于没有后缀表达式,试图匹配总是失败
正则样例:
,{0,1}"5":\[[^\[\]]*(((?'Open'\[)[^\[\]]*)+((?'-Open'\])[^\[\]]*)+)*(?(Open)(?!))\],{0,1}
测试数据:
{"0":["0","0-1","0-2"],"1":["1","1-1","1-2"],"2":["2","2-1","2-2"],"3":["3","3-1","3-2"],"4":["4","4-1","4-2"],"5":["5","5-1","5-2"]}
比对结果:,"1":["1","1-1","1-2"],
评语:这个写的很不错。

