What is a elegant way in Ruby to tell if a variable is a Hash or an Array?

Question

To check what @some_var is, I am doing a

if @some_var.class.to_s == \'Hash\' 

I am sure there is a more elegant way to check if

Answer 1

I use this:

@var.respond_to?(:keys)

It works for Hash and ActiveSupport::HashWithIndifferentAccess.