Help with REGEX match cases

[jeweladdict]

Can you guys tell me if these are correct? I'm parsing a file, word by word, and I'm trying to see if they fit into the correct format. The first format is if the token is a double. Meaning we have 1234 or 1234.0123 What I have is if( (Regex.IsMatch( token, @"\d*")) || (Regex.IsMatch( token, @"\d*[.]\d*")) ) The second is if it is a letter followed by any other alphanumeric up to 10 characters total in length: if( Regex.IsMatch( token, @"\b[a-zA-z]\w{2,3,4,5,6,7,8,9}\b") ) Do those look right? Thanks in advance!

[Christian Graus]

jeweladdict wrote:

What I have is if( (Regex.IsMatch( token, @"\d*")) || (Regex.IsMatch( token, @"\d*[.]\d*")) )

You can do this with one regex @"\d*([.]\d*)?"

jeweladdict wrote:

if( Regex.IsMatch( token, @"\b[a-zA-z]\w{2,3,4,5,6,7,8,9}\b") )

YOu can shorten {2,3,4,5,6,7,8,9} to {2, 9}. Expresso is the program you need to test your regex, just google it, I think it's on CP tho. Christian Graus - Microsoft MVP - C++

[jeweladdict]

@"\d*([.]\d*)?" seems to work for IP addresses as well. I tried using the @"\b\d*([.]\d*)?\b" but that didn't seem to help. I'm only looking for numbers that are possible doubles. Any ideas?