Android Question Regex.Matcher - Single Occurance of a Char?

[JohnD]

I am defining a name with no spaces below:

Dim MatchName As Matcher = Regex.Matcher("^[A-Za-z0-9]{1,20}$", Name)

If MatchName.Find = True Then
    bRet = True
End If

How do I allow for 1 and only 1 embedded space? Thanks, JD.

 

[DonManfred]

I´m not really good at regex... But maybe

^(\w*)(\s)(\w*)$
one word, one space, one word (for Ex. Manfred Ssykor)

?

 

[JohnD]

I'll try it. Thanks.

 

[DonManfred]

Did it help?

 

[JohnD]

Worked perfectly.

 

[DonManfred]

great

 

[JohnD]

Actually, I gave you the wrong specification for what I needed. You answered my question perfectly. However, what I should have said is "I need the user to be able to enter 1 and only 1 embedded space...and the embedded space is optional, not required." Is there a way to make that embedded space optional? Thanks again Manfred. JD.

 

[bparent]

Actually, I gave you the wrong specification for what I needed. You answered my question perfectly. However, what I should have said is "I need the user to be able to enter 1 and only 1 embedded space...and the embedded space is optional, not required." Is there a way to make that embedded space optional? Thanks again Manfred. JD.

Try ^(\w*)(\s?)(\w*)$

 

[JohnD]

Bulls-eye. Now this string makes a lot more sense:

Dim MatchEmail As Matcher = Regex.Matcher("^(?i)[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])$", EmailAddress)