Extract number from string in Ruby

Question

I\'m using this code:

s = line.match( /ABCD(\\d{4})/ ).values_at( 1 )[0] 

To extract numbers from strings like:

ABCD1234
AB         


        

Answer 1

To extract number part from a string use the following:

str = 'abcd1234'
/\d+/.match(str).try(:[], 0)

It should return 1234