Regex to remove string from string

Question

Is there a regex pattern that can remove .zip.ytu from the string below?

werfds_tyer.abc.zip.ytu_20111223170226_20111222.20111222

Solution 1

Just use String.Replace()

String.Replace(".zip.ytu", ""); 

You don't need regex for exact matches.

Solution 2

Here is an answer using regex as the OP asked.

To use regex, put the replacment text in a match ( ) and then replace that match with nothing string.Empty:

string text = @"werfds_tyer.abc.zip.ytu_20111223170226_20111222.20111222";
string pattern = @"(\.zip\.ytu)";

Console.WriteLine( Regex.Replace(text, pattern, string.Empty ));

// Outputs 
// werfds_tyer.abc_20111223170226_20111222.20111222

Solution 3

txt = txt.Replace(".zip.ytu", "");

Why don't you simply do above?

Solution 4

Don't really know what is the ".zip.ytu", but if you don't need exact matches, you might use something like that:

string txt = "werfds_tyer.abc.zip.ytu_20111223170226_20111222.20111222";

Regex mRegex = new Regex(@"^([^.]*\.[^.]*)\.[^.]*\.[^_]*(_.*)$");
Match mMatch = mRegex.Match(txt);

string new_txt = mRegex.Replace(txt, mMatch.Groups[1].ToString() + mMatch.Groups[2].ToString());

Solution 5

use string.Replace:

txt = txt.Replace(".zip.ytu", "");

View more solutions

Comments

[ΩmegaMan]

[^.]* (Zero to unlimited) of not a period. Why kill the regex parser with the '*', specifically as the zero condition being valid? Instead, use of the '+' saying -1- to many would provide a better hint and not cause back tracking. Do you really believe that there will be nothing followed by a period; or do you believe that at least 1 character will exist? If you believe that 1 character will exist, then use that and not the *. HTH

[Dmitry Frank]

I wrote that i don't really know what is the ".zip.ytu", and, well, i don't know what the whole string is. So, i could admit that this string might be something like "..test1.test2_123123.123123", because of why not? If i really know that there always should be something between these dots, then, of course, i would use "+" instead of "*". What's wrong?

[Richard Moore]

OP asked for a solution involving a regex. Years later I come here looking for a solution with a regex. You are correct but this doesn't answer OPs or my question.

[Richard Moore]

This is the actual answer to the question. 👍

[Brian Booth]

This is the solution I was looking for. I'm not looking for exact matches, but regex pattern removal.

[Mark Odey]

Sometimes you don't have javascript to fix the problem.