Is there an opposite of include? for Ruby Arrays?

Question

I\'ve got the following logic in my code:

if !@players.include?(p.name)
  ...
end

@players is an array. Is there a method so

Answer 1

Using unless is fine for statements with single include? clauses but, for example, when you need to check the inclusion of something in one Array but not in another, the use of include? with exclude? is much friendlier.

if @players.include? && @spectators.exclude? do
  ....
end

But as dizzy42 says above, the use of exclude? requires ActiveSupport