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Daniel_Draco
Newbie
Joined: 08 Aug 2009
Posts: 8
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 Posted: Mon Jun 17, 2013 10:33 pm
Regex Case Sensitivity
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I have a need to remove all non-capitalized words from a list of words. As part of this I am using a regex to recognize which words begin with a capital letter -- and this is where it's failing. The problem can be demonstrated by inputting:
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| #say %regex("thisislowercase","[A-Z]\w+") |
For me, this yields 1, indicating that a match was found, when it definitely should not; the [A-Z] should only match a capital letter. Is this issue unique to me? Is there any way to fix it?
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Daern
Sorcerer
Joined: 15 Apr 2011
Posts: 809
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Posted: Tue Jun 18, 2013 2:00 am
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CMUD has the case insensitive option on by default. You can use (?-i) in your pattern to turn it off.
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Anaristos
Sorcerer
Joined: 17 Jul 2007
Posts: 821
Location: California
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Posted: Tue Jun 18, 2013 2:55 am
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It seems that the default for CMUD regex is case insensitivity. Doing it this way works:
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#SAY %regex("thisislowercase","(?-i)[A-Z]\w+")
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(?-i) turns case sensitivity on. |
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_________________
Sic itur ad astra. |
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Daern
Sorcerer
Joined: 15 Apr 2011
Posts: 809
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Posted: Tue Jun 18, 2013 3:46 am
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Umm... I thought I just said exactly that?
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Daniel_Draco
Newbie
Joined: 08 Aug 2009
Posts: 8
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Posted: Tue Jun 18, 2013 5:43 am
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Aha, that worked, thanks. This doesn't appear to be anywhere in the documentation, for some reason -- in fact, the documentation of #REGEX implies that it is case sensitive by default.
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Moab
Beginner
Joined: 02 Aug 2008
Posts: 25
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Posted: Tue Jun 18, 2013 5:10 pm
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Just ran into this myself.
Thanks! |
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Daern
Sorcerer
Joined: 15 Apr 2011
Posts: 809
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Posted: Wed Jun 19, 2013 5:19 pm
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Probably because CMUD doesn't have any extensive documentation on regular expressions. There's plenty of sites for that.
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