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 

Answer 2

Try this #(\S+)\s?

Answer 3

Match a word starting with # after a white space or the beginning of a line. The last word boundary in not necessary depending on your usage.

/(?:^|\s)\#(\w+)\b/

The parentheses will capture your word in a group. Now, it depends on the language how you apply this regex.

The (?:...) is a non-capturing group.