ruby/rails: How to determine if module is included?
If I understand your question correctly, you can use Module#include?:
Man.include?(Features)For example:
module Mendclass C include MendC.include?(M) # => trueOther ways
Checking Module#included_modules
This works, but it's a bit more indirect, since it generates intermediate included_modules array.
C.included_modules.include?(M) # => truesince C.included_modules has a value of [M, Kernel]
Checking Module#ancestors
C.ancestors.include?(M) #=> truesince C.ancestors has a value of [C, M, Object, Kernel, BasicObject]
Using operators like <
The Module class also declares several comparison operators:
Example:
C < M # => true