Add element to an array if it's not there already

Question

I have a Ruby class

class MyClass
  attr_writer :item1, :item2
end

my_array = get_array_of_my_class() #my_array is an array of MyClass
unique_array_of_item1 = [         


        

Answer 1

You can convert item1 to array and join them:

my_array | [item1]