Re: Return Data Regex Doesn't Isolate - Yikes

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From: Justin Rogers (Justin_at_games4dotnet.com)
Date: 04/11/04 

Date: Sun, 11 Apr 2004 15:03:50 -0700

I had some rather large explanation of how to do it procedurally, but then I
thought,
"Justin, get off your arse and write some regular expression magic!". So here
you go.

using System;
using System.Text.RegularExpressions;

public class SuperRegex {
private static string stuff =
@"00000000000000000000
200~11111111111111111
22222222222222222222222222222
3333333333333
200~444444444444444444444444
555555555555555555555555555555555
66666666
200~777777777777777777
888888888888";

    private static void Main(string[] args) {
        Regex regex = new Regex("(?ms)(?:\\A|^200~)(.*?)(?=^200~|\\Z)");
        MatchCollection matches = regex.Matches(stuff);
        for(int i = 0; i < matches.Count; i++) {
            Console.WriteLine();
            Console.WriteLine(matches[i].Value);
            Console.WriteLine();
        }
    }
} 

-- 
Justin Rogers
DigiTec Web Consultants, LLC.
Blog: http://weblogs.asp.net/justin_rogers
"Garibaldi" <ty_92648 AT hotmail.com> wrote in message
news:%238ChU$9HEHA.3144@TK2MSFTNGP10.phx.gbl...
> Folks,
>
> I'm having a bad regex day and can sure use your help, please..
>
> I have a Regex expression that works fine. It's purpose is to isolate all
> data from the start of a string begining with 200~ to the end of the string
> but before the start of the next 200~. Here's the regex expression and test
> data:
>
> (?ms)^200~(.*?)(?=^200~)
>
> Here's some test data
>
> 00000000000000000000
> 200~11111111111111111
> 22222222222222222222222222222
> 3333333333333
> 200~444444444444444444444444
> 555555555555555555555555555555555
> 66666666
> 200~777777777777777777
> 888888888888
>
> The regex will return 200~ plus all ones, twos, threes as a group then 200~
> plus all fours, fives, sixes as a group
>
> Problem
> ---------
> Now I need to do the reverse. I need to return all the data the preceding
> regex doesn't return. IOW, I need to return all the zeros and 200~ plus all
> the sevens and all the eights as a group. I want to execute "NOT
> (?ms)^200~(.*?)(?=^200~)"
>
> Sure could use a pointer to the correct starting point or any suggestion
> that will help me reach my goal.
>
> Thanks in advance
>
> ty_92648 AT hotmail.com
>
>

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