Question

I’m pretty new on grails, I’m having a problem in matches validation using regex. What I wanted to happen is my field can accept a combination of alphanumeric and specific special characters like period (.), comma (,) and dash (-), it may accept numbers (099) or letters only (alpha) , but it won’t accept input that only has special characters (“.-,”). Is it possible to filter this kind of input using regex?
please help. Thank you for sharing your knowledge.

Answer 1

^[0-9a-zA-Z,.-]*?[0-9a-zA-Z]+?[0-9a-zA-Z,.-]*$

meaning:
  /
  ^          beginning of the string
  [...]*?    0 or more characters from this class (lazy matching)
  [...]+?    1 or more characters from this class (lazy matching)
  [...]*     0 or more characters from this class
  $          end of the string
  /