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regex for "<>"

Posted on 2014-02-06
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Last Modified: 2014-02-06
What is the regex pattern for "<anyword>" or "<<anyword>>" ?
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Question by:VBdotnet2005
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Expert Comment

by:Terry Woods
ID: 39840736
If you want a pattern that matches both those cases, and doesn't allow any non-alphabetic characters, then this is nice and simple:
<[a-zA-Z]+>|<<[a-zA-Z]+>>

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There are other ways of doing it, but I think that way is easiest to understand.
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Expert Comment

by:Terry Woods
ID: 39840739
If the string you're testing against must contain no other characters, then you'll want to use this one instead:
^(<[a-zA-Z]+>|<<[a-zA-Z]+>>)$

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by:VBdotnet2005
ID: 39840740
I am sorry. I didn't even think about number. What if it can be anything inside "<alph or non-alpha>" and ignore lower or upper case?
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Terry Woods earned 2000 total points
ID: 39840744
If you want to just allow alphanumeric:
<[a-zA-Z0-9]+>|<<[a-zA-Z0-9]+>>

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If you want to just allow alphanumeric and space characters:
<[a-zA-Z0-9 ]+>|<<[a-zA-Z0-9 ]+>>

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If you want to allow any character except a > character:
<[^>]+>|<<[^>]+>>

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Author Comment

by:VBdotnet2005
ID: 39840761
Thank you. That works for me.
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