Find values in common between two arrays

Question

If I want to compare two arrays and create an interpolated output string if an array variable from array y exists in x how can I get an output for each matching element?

This is what I was trying but not quite getting the result.

x = [1, 2, 4] y = [5, 2, 4] x.each do |num|   puts " The number #{num} is in the array" if x.include?(y.each) end #=> [1, 2, 4] 

Answer 1

You can use the set intersection method & for that:

x = [1, 2, 4] y = [5, 2, 4] x & y # => [2, 4]