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
ABCD1235
ABCD1236

etc.

It works, but I wonder what other alternative I have to to this in Ruby?

My code:

ids = [] 
someBigString.lines.each {|line|
   ids << line.match( /ABCD(\d{4})/ ).values_at( 1 )[0] 
}

Answer 1

a.map {|x| x[/\d+/]}