How to handle OR operator in wildcard?

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<([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

Posted 30-Dec-14 2:42am

smksamy

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Thomas Daniels · Answer 1 · 2014-12-30T02:48:00

Solution 1

Don't forget that your character class indicates that there is one Roman numeral, not multiple. Also, you might want to add ^ and $ at the beginning/end to indicate that the string starts/ends.

^[ivxlcdm]+|[IVXLCDM]+$

The + indicates: one or more.

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

^[ivxlcdmIVXLCDM]+$

Posted 30-Dec-14 2:48am

Thomas Daniels

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smksamy 30-Dec-14 9:14am

bro this is regex if any option without regex , only wildcard

Thomas Daniels 30-Dec-14 9:15am

What do you mean by "wildcard"? Your question is tagged RegEx so I provided a regex.

Kornfeld Eliyahu Peter · Answer 2 · 2014-12-30T02:50:00

Solution 2

In regex [] defines a group of 'on-of-the-values', so in your case it is on from the small or one from the large...
http://regexper.com/#%3C(%5Bivxlcdm%5D%40%7C%5BIVXLCDM%5D%40)%3E[^]
I can not see a reason why not to combine the groups together...

<([ivxlcdmIVXLCDM]+@)>

http://regexper.com/#%3C(%5BivxlcdmIVXLCDM%5D%2B%40)%3E[^]

Posted 30-Dec-14 2:50am

Kornfeld Eliyahu Peter

v2

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smksamy 30-Dec-14 9:13am

it gives small letter and caps letter in mixed, any possible way to avoid mixed roman letter like this [ I,ii,iv,ix ,I,II,IV,IX] not this[iI,iX,iVv]

Kornfeld Eliyahu Peter 30-Dec-14 9:17am

In that case you should look for this: [ivxlcdm]+|[IVXLCDM]+
http://regexper.com/#%5Bivxlcdm%5D%2B%7C%5BIVXLCDM%5D%2B