Question

What’s happening in this code snippet ?

    RegexOptions options = RegexOptions.None;
    Regex regex = new Regex(@"[ ]{2,}", options);
    string outStr = regex.Replace(inStr, @" ");

What I am looking for is to replace any sequences of “white” spaces ( including TAB, CR, LF ) with a single space.

Answer 1

Let’s break it down:

[ ]          <-- matches a single space
{2,}         <-- previous token is repeated 2 or more times

So this would match 2 or more consecutive spaces.

Then the .Replace call, this would replace those sequences of 2 or more spaces with just one space.