I need help putting together a regex that will match word that ends with "Id" with case sensitive match.
+1
A:
How about "\A[a-z]*Id\z"? [This makes characters before 'Id' optional. Use "\A[a-z]+Id\z" if there needs to be one or more characters preceding "Id."]
tk-421
2010-02-12 20:08:19
A:
Regex ids = new Regex(@"\w*Id\b", RegexOptions.None);
"\b" means "word break" & \w mean any word character, so \w*Id\b means "{stuff}Id". By not including RegexOptions.IgnoreCase, it will be case sensitive.
James Curran
2010-02-12 20:10:03
+4
A:
Try this regular expression:
\w*Id\b
\w* allows word characters in front of Id and the \b ensures that Id is at the and of the word (\b is word boundary assertion).
Gumbo
2010-02-12 20:11:44
@epitka, note that `\w` also matches numbers and the underscore. In short the strings `___Id` and `12345Id` will also be matched.
Bart Kiers
2010-02-12 20:17:29
I gave you an upvote, but epitka doesn't specify if just "Id" is allowable, so I'd be tempted to change the * for a +
BenAlabaster
2010-02-12 20:19:17
+1
A:
I would use
\b[A-Za-z]*Id\b
The \b matches the beginning and end of a word i.e. space, tab or newline, or the beginning or end of a string.
The [A-Za-z] will match any letter, and the * means that 0+ get matched. Finally there is the Id.
Note that this will match words that have capital letters in the middle such as 'teStId'.
I use http://www.regular-expressions.info/ for regex reference
MrBones
2010-02-12 20:12:53
The set `a-z` excludes `é` and other similar characters. Perhaps not an issue, but something epitka may want to know.
Bart Kiers
2010-02-12 20:18:44
[A-Za-z] doesn't match non-English alphabetic characters, so should be avoided in favour of \w unless a guarantee can be made that only English letters will appear.
BenAlabaster
2010-02-12 20:20:40
+1
A:
This may do the trick:
\b\p{L}*Id\b
Where \p{L} matches any (Unicode) letter and \b matches a word boundary.
Bart Kiers
2010-02-12 20:16:17
does \p{L} work in C# regex? I've never seen that one before and usually opt for \w
BenAlabaster
2010-02-12 20:18:19
@BenAlabaster, yes: http://msdn.microsoft.com/en-us/library/20bw873z.aspx#SupportedUnicodeGeneralCategories And yes, perhaps `\w` is sufficient for the OP, but it matches more than letters (see my comment under Gumbo's post).
Bart Kiers
2010-02-12 20:21:28
A:
Gumbo gets my vote, however, the OP doesn't specify whether just "Id" is an allowable word, which means I'd make a minor modification:
\w+Id\b
1 or more word characters followed by "Id" and a breaking space. The [a-zA-Z] variants don't take into account non-English alphabetic characters. I might also use \s instead of \b as a space rather than a breaking space. It would depend if you need to wrap over multiple lines.
BenAlabaster
2010-02-12 20:17:21