what's the regular expression to find two sets of parenthesis in a row using perl?

Question

I have rows with different sets of parenthesis. For example

     (sdfsfs) (sfdsfd) 
     (sdfsfs) (sfdsfd) (sfdsfd) 
     (sdfsfs) (sfdsfd) (sfdsfd) (sfdsfd)
            


        

Answer 1

^(?:\s*\([^\)(]*\)\s*){2}$

You can define this pattern with anchors.See demo.

https://regex101.com/r/eX9gK2/10