regular expression help 1

[shades44]

Hi,

can anyone give me the regular expression for finding sole instances of "\n", not grouped in twos or more.. something along the lines of:

{not "\n"}{"\n"}{not "\n"}

Thank you,
shady

 

[oppcos]

You are on the right track. ^ is not in regular expressions. You also want to make sure you aren't limiting other characters, so put the ^\n's in a range box []. Here's a quick example:

using System.Text.RegularExpressions;
...
string pattern1 = "This is \n\n a test.";
string pattern2 = "This is \n pattern 2.";
Regex test_pattern=new Regex("[^\n]\n[^\n]");
if(test_pattern.IsMatch(pattern1))
  Console.WriteLine("Pattern 1 matches.");
if(test_pattern.IsMatch(pattern2))
  Console.WriteLine("Pattern 2 matches.");

 

[shades44]

Thank you very much oppcos. You've been a great help!

shady

 

[shades44]

There was something i forgot to mention before..

string result = Regex.Replace("cat\n monkey \n\n mouse", "[^\\n]\\n[^\\n]", " ");

'result' in this case will be: "ca monkey \n\n mouse" because the letters being replaced are "t\n " ie. the \n and the surrounding letters. How do i only find one occurance of \n and then replace it only.. so that when i come to a string like "cat\n monkey \n\n mouse" i end up with "cat monkey \n\n mouse", not "ca monkey \n\n mouse".

Any ideas?

 

[shades44]

I discovered how to do it.. for anyone interested i did it using groups:

Regex.Replace(myString, "([^\\n])(\\n)([^\\n])", "$1 $3");

this will find every sole occurence of \n and replace it with a space.