find value after nth occurence of - using RegEx

Question

This expression

[A-Z]+(?=-\d+$)

find SS and BCP from following string

ANG-B31-OPS-PMR-MACE-SS-0229

ANG-RGN-SOR-BCP-0004

What I want to do is find the value after third "-" which is PMR in first string and BCP in second string

Any help will be highly appreciated

score 1 · Answer 1 · answered Mar 19 '13 at 22:27

1

The lookbehind and lookahead will exclude the pre and post part from the match

string mus = "ANG-B31-OPS-PMR-MACE-SS-0229";

string pat = @"(?<=([^-]*-){3}).+?(?=-)";
MatchCollection mc = Regex.Matches(mus, pat, RegexOptions.Singleline);
foreach (Match m in mc)
{
    Console.WriteLine(m.Value);
}

answered Mar 19 '13 at 22:27

VladL

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need to use the Regex only, cannot use C# – user2188559 Mar 19 '13 at 22:47
@user2188559 so what's the problem, take the pattern and use it. Also remove c# tag from the question – VladL Mar 19 '13 at 22:50

score 0 · Answer 2 · answered Mar 19 '13 at 22:21

0

What about simple String.Split?

string input = "ANG-B31-OPS-PMR-MACE-SS-0229";
string value = input.Split('-')[3]; // PMR

answered Mar 19 '13 at 22:21

Sergey Berezovskiy

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need to use the Regex only, cannot use C# – user2188559 Mar 19 '13 at 22:39
@user2188559 Do you want us to inline assembly or what? – It'sNotALie. Mar 19 '13 at 23:05
This get me the correct value, but how can i say that within RegEx so string value = input.Regex(); somethig like that – user2188559 Mar 20 '13 at 09:10
@user2188559 what the reason? String.Split is much faster and simpler. If you have fixed format of input (i.e. values separated by '-' with at least four values, and you need fourth of them) then RegeEx is overkill – Sergey Berezovskiy Mar 20 '13 at 09:20

score 0 · Answer 3 · edited May 23 '17 at 12:28

0

If you have the option it would be simpler to locate the third "-" and take a substring of the input. See nth-index-of.

var input = "ANG-B31-OPS-PMR-MACE-SS-0229";
input = input.Substring(input.NthIndexOf("-", 3) + 1, 3);

edited May 23 '17 at 12:28

Community

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answered Mar 19 '13 at 22:24

Josiah Ruddell

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need to use the Regex only, cannot use C# – user2188559 Mar 19 '13 at 22:41

find value after nth occurence of - using RegEx

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