How to check if each word in an array contains a substring and reject those in Ruby on Rails?

Question

a = ["SUPER", "SOME_VALID", "ROME_INVALID", "SUPER_GOOD"]
a = a.reject { |x| x.in? ["GOOD", "VALID"]}
#=> ["SUPER", "SOME_VALID", "ROME_INVALID", "SUPER_GOOD"]

I don't want words that contain substring VALID or GOOD.

Output should be ["SUPER"] only.

Answer 1

grep_v would work:

a = ["SUPER", "SOME_VALID", "ROME_INVALID", "SUPER_GOOD"]
a = a.grep_v(/GOOD|VALID/)
#=> ["SUPER"]

Answer 2

You could say this:

a = a.reject { |x| x.include?("GOOD") || x.include?("VALID")}