Question

If I know the current_user‘s answers because the User model has an answers collection:

current_user.answers

How do I test whether that answers collection contains the current answer (referenced by the @answer class variable) at each step of a loop?

I was tempted to use the include? method:

current_user.answers.include?(@answer)

but I see it’s for mixins 🙁

Answer 1

All Enumerable collections (including Arrays, Hashes and Sets) have the include? method to test membership.

[1,2,3].include? 2 # => true
{foo: 'foo', bar: 'bar'}.include? :foo # => true
[1,2,3].include? 5 # => false

(There’s also an include? method that modules have, but it’s not the same thing.)