c# - Regex to find words that start with a specific character

Question

I am trying to find words starts with a specific character like:

Lorem ipsum #text Second lorem ipsum. How #are You. It's ok. Done. Something #else now.

I need to get all words starts with "#". so my expected results are #text, #are, #else

Any ideas?

Answer 1

Search for:

• something that is not a word character then
• #
• some word characters

So try this:

/(?<!w)#w+/

Or in C# it would look like this:

string s = "Lorem ipsum #text Second lorem ipsum. How #are You. It's ok. Done. Something #else now.";
foreach (Match match in Regex.Matches(s, @"(?<!w)#w+"))
{
    Console.WriteLine(match.Value);
}

Output:

#text
#are
#else