如何在通配符中处理OR运算符？ [英] How to handle OR operator in wildcard?

问题描述

<([ivxlcdm]@)> for capture the small roman letters
		
		
i use this wild card for capture the oxidation terms 
like this[ i ,iii, iv, ix
]	
		all are in small case, i am trying to select both small case and uppercase in single wildcard it not worked whats the problem
		
		<([ivxlcdm]@|[IVXLCDM]@)> for capture both caps and small roman letters

推荐答案

别忘了你的ch aracter类表示一个罗马数字，而不是多个。此外，您可能希望在开头添加 ^ 和

Don't forget that your character class indicates that there is one Roman numeral, not multiple. Also, you might want to add ^ and

结束以表示字符串开始/结束。

at the beginning/end to indicate that the string starts/ends.

^[ivxlcdm]+|[IVXLCDM]+

+ 表示：一个或多个。



如果你允许将小写和大写罗马数字混合在一起，将它们全部放在一个字符类中：

The + indicates: one or more.

If you allow that lowercase and uppercase Roman numerals are mixed, put them all in one character class:

^[ivxlcdmIVXLCDM]+

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