Regex to match multiple whole words
How do I write a regex, that works in wxRegEx, to match something this pseudo regex: *good|better|best*
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I know about regex matching at the character level, i.e. *.[ch]pp
, but how does it go as far as whole words go?
Thanks.
This question is a good example of why you should always specify the flavor of regex you're using. Most regex flavors provide a way to match word boundaries, and most of those use \b
for that. According to this page, wxRegEx lets you choose one of three flavors: BRE, ERE, or ARE. Of those, only ARE supports word boundaries, and it uses \y
, not \b
. Assuming you specify wxRE_ADVANCED
when you compile it, this regex will match any string that contains one of the words good
, better
, or best
:
\y(good|better|best)\y
Judging by the examples you used, I think you may be confusing regexes with globs. For example, *.[ch]
is the glob you'd use to match file names ending with .c
or .h
; the regex for that would be \.[ch]$
. There's a good regex tutorial at the site I linked to earlier, but the difference I'm most concerned with is that a regex doesn't have to describe the whole string like a glob does. That's why I didn't have to start the regex with .*
, but I did have to add $
to the end, to keep it from matching strings like foo.cs
or bar.html
.
good|better|best
I don't know what you mean by "elegant". As far as I'm concerned, that's pretty elegant.
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