Hi, I have 2 lists a=[1,2,3,4] b=[2,4,6,7,8] I want to find if there are any elements present in "a" which are also present in "b". I jus wanna "true" or "false" answer if both of the arrays have any element in common. Is there any inbuilt functions like "include?" for this purpose?? Thanks in Advance. -- Posted via http://www.ruby-forum.com/.