Regex to match '-' delimited alphanumeric words

Question

I would like to test if user type only alphanumeric value or one \"-\".

hello-world                 -> Match
hello-first-world           -> match
this-         


        

Answer 1

I'm not entirely sure if this works because I haven't done regex in awhile, but it sounds like you need the following:

/^[A-Za-z0-9]+(-[A-Za-z0-9]+)+$/

You're requirement is split up in the following:

• One or more alphanumeric characters to start (that way you ALWAYS have an alphanumeric starting.
• The second half entails a "-" followed by one or more alphanumeric characters (but this is optional, so the entire thing is required 0 or more times). That way you'll have 0 or more instances of the dash followed by 1+ alphanumeric.

I'm just not sure if I did the regex properly to follow that format.