Regex in C#

  • Thread starter Thread starter mick
  • Start date Start date
M

mick

Taking a few tentative steps into regex. Given this string -

"Northamptonshire T20 251/10 v Yorkshire T20 136/10 & 237 *"

I want to match "251/10 " and "136/10 " and "& 237 *" so I can remove them.

In these two regex testers -
http://www.regexr.com/
and http://regexpal.com/

the pattern "\d+\/\d+\s|\&\s\d+\s\*" does the trick but when I try in C#

var newString = Regex.Replace(s,@"\d+\/\d+\s|\&\s\d+\s\*","");

it doesn't remove the final part "& 237 *"

Are there differences in the .net implementation? Anyone give a hint as
to where I'm going wrong?

mick
 
Taking a few tentative steps into regex. Given this string -

"Northamptonshire T20 251/10 v Yorkshire T20 136/10 & 237 *"

I want to match "251/10 " and "136/10 " and "& 237 *" so I can remove them.

In these two regex testers -
http://www.regexr.com/ and http://regexpal.com/

the pattern "\d+\/\d+\s|\&\s\d+\s\*" does the trick but when I try in C#

var newString = Regex.Replace(s,@"\d+\/\d+\s|\&\s\d+\s\*","");
it doesn't remove the final part "& 237 *"
Are there differences in the .net implementation? Anyone give a hint as
to where I'm going wrong?

mick
Click to expand...

NOT an expert on Regex!!!

Using Expresso I get this code

private static void Main(string[] args)
{
Regex MyRegex = new Regex(
"\\d+\\/\\d+\\s|\\&\\s\\d+\\s\\*",
RegexOptions.IgnoreCase
| RegexOptions.CultureInvariant
| RegexOptions.IgnorePatternWhitespace
| RegexOptions.Compiled
);
string InputText = "Northamptonshire T20 251/10 v Yorkshire
T20 136/10 & 237 *";
string MyRegexReplace = string.Empty;

// Replace the matched text in the InputText using the
replacement pattern
string result = MyRegex.Replace(InputText, MyRegexReplace);
}

and it works! Leaves a blank last but...

// Anders
 
Taking a few tentative steps into regex. Given this string -

"Northamptonshire T20 251/10 v Yorkshire T20 136/10 & 237 *"

I want to match "251/10 " and "136/10 " and "& 237 *" so I can remove them.

In these two regex testers -
http://www.regexr.com/ and http://regexpal.com/

the pattern "\d+\/\d+\s|\&\s\d+\s\*" does the trick but when I try in C#

var newString = Regex.Replace(s,@"\d+\/\d+\s|\&\s\d+\s\*","");
it doesn't remove the final part "& 237 *"
Are there differences in the .net implementation? Anyone give a hint as
to where I'm going wrong?

mick
Click to expand...

NOT an expert on Regex!!!

Using Expresso I get this code

private static void Main(string[] args)
{
Regex MyRegex = new Regex(
"\\d+\\/\\d+\\s|\\&\\s\\d+\\s\\*",
RegexOptions.IgnoreCase
| RegexOptions.CultureInvariant
| RegexOptions.IgnorePatternWhitespace
| RegexOptions.Compiled
);
string InputText = "Northamptonshire T20 251/10 v Yorkshire
T20 136/10 & 237 *";
string MyRegexReplace = string.Empty;

// Replace the matched text in the InputText using the
replacement pattern
string result = MyRegex.Replace(InputText, MyRegexReplace);
}

and it works! Leaves a blank last but...
Taking a few tentative steps into regex. Given this string -

"Northamptonshire T20 251/10 v Yorkshire T20 136/10 & 237 *"

I want to match "251/10 " and "136/10 " and "& 237 *" so I can remove them.

In these two regex testers -
http://www.regexr.com/ and http://regexpal.com/

the pattern "\d+\/\d+\s|\&\s\d+\s\*" does the trick but when I try in C#

var newString = Regex.Replace(s,@"\d+\/\d+\s|\&\s\d+\s\*","");
it doesn't remove the final part "& 237 *"
Are there differences in the .net implementation? Anyone give a hint as
to where I'm going wrong?

mick
Click to expand...

NOT an expert on Regex!!!

Using Expresso I get this code

private static void Main(string[] args)
{
Regex MyRegex = new Regex(
"\\d+\\/\\d+\\s|\\&\\s\\d+\\s\\*",
RegexOptions.IgnoreCase
| RegexOptions.CultureInvariant
| RegexOptions.IgnorePatternWhitespace
| RegexOptions.Compiled
);
string InputText = "Northamptonshire T20 251/10 v Yorkshire
T20 136/10 & 237 *";
string MyRegexReplace = string.Empty;

// Replace the matched text in the InputText using the
replacement pattern
string result = MyRegex.Replace(InputText, MyRegexReplace);
}

and it works! Leaves a blank last but...
Click to expand...

Yes, it does seem to. Any idea why the first one doesn't? I'm going to have to
check out what those flags do. Cheers.

mick
 
Taking a few tentative steps into regex. Given this string -

"Northamptonshire T20 251/10 v Yorkshire T20 136/10 & 237 *"

I want to match "251/10 " and "136/10 " and "& 237 *" so I can remove them.

In these two regex testers -
http://www.regexr.com/ and http://regexpal.com/

the pattern "\d+\/\d+\s|\&\s\d+\s\*" does the trick but when I try in C#

var newString = Regex.Replace(s,@"\d+\/\d+\s|\&\s\d+\s\*","");
it doesn't remove the final part "& 237 *"
Are there differences in the .net implementation? Anyone give a hint as
to where I'm going wrong?
Click to expand...

I can not reproduce your problem.

using System;
using System.Text.RegularExpressions;

namespace E
{
public class Program
{
public static void Main(string[] args)
{
string s = "Northamptonshire T20 251/10 v Yorkshire T20
136/10 & 237 *";
string s2 = Regex.Replace(s,@"\d+\/\d+\s|\&\s\d+\s\*", "");
Console.WriteLine("|" + s2 + "|");
string s3 = Regex.Replace(s,@"\d+/\d+\s|&\s\d+\s\*", "");
Console.WriteLine("|" + s3 + "|");
string s4 = Regex.Replace(s,@"\s\d+/\d+|\s&\s\d+\s\*", "");
Console.WriteLine("|" + s4 + "|");
Console.ReadKey();
}
}
}

outputs:

|Northamptonshire T20 v Yorkshire T20 |
|Northamptonshire T20 v Yorkshire T20 |
|Northamptonshire T20 v Yorkshire T20|

here (.NET 4.5.1).

Arne
 
Taking a few tentative steps into regex. Given this string -

"Northamptonshire T20 251/10 v Yorkshire T20 136/10 & 237 *"

I want to match "251/10 " and "136/10 " and "& 237 *" so I can remove them.

In these two regex testers -
http://www.regexr.com/ and http://regexpal.com/

the pattern "\d+\/\d+\s|\&\s\d+\s\*" does the trick but when I try in C#

var newString = Regex.Replace(s,@"\d+\/\d+\s|\&\s\d+\s\*","");
it doesn't remove the final part "& 237 *"
Are there differences in the .net implementation? Anyone give a hint as
to where I'm going wrong?
Click to expand...

I can not reproduce your problem.

using System;
using System.Text.RegularExpressions;

namespace E
{
public class Program
{
public static void Main(string[] args)
{
string s = "Northamptonshire T20 251/10 v Yorkshire T20 136/10 &
237 *";
string s2 = Regex.Replace(s,@"\d+\/\d+\s|\&\s\d+\s\*", "");
Console.WriteLine("|" + s2 + "|");
string s3 = Regex.Replace(s,@"\d+/\d+\s|&\s\d+\s\*", "");
Console.WriteLine("|" + s3 + "|");
string s4 = Regex.Replace(s,@"\s\d+/\d+|\s&\s\d+\s\*", "");
Console.WriteLine("|" + s4 + "|");
Console.ReadKey();
}
}
}
outputs:

|Northamptonshire T20 v Yorkshire T20 |
|Northamptonshire T20 v Yorkshire T20 |
|Northamptonshire T20 v Yorkshire T20|

here (.NET 4.5.1).
Click to expand...

This is bizarre. I can't reproduce the problem today either. I get the result I
expected.
Very strange.

mick
 
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