ruby - moved grep from string method to enumerable

example.rb

ruby-1.8.7-p352 $ irb
1.8.7 :001 > thing = 'sometext'
 => "sometext" 
1.8.7 :002 > thing.grep(/some/)
 => ["sometext"] 

 ruby-1.9.2-p290 $ irb
1.9.2p290 :001 > thing = 'sometext'
 => "sometext" 
1.9.2p290 :002 > thing.grep(/some/)
NoMethodError: undefined method `grep' for "sometext":String
	from (irb):2
	from /Users/michael/.rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in `<main>'
1.9.2p290 :003 > thing.lines.grep(/some/)
 => ["sometext"]

thank you

This has saved me just now as well.