gistfile1.txt

[1] pry(main)> RUBY_VERSION
=> "2.1.0"
[2] pry(main)> require 'active_support/hash_with_indifferent_access'
=> true
[3] pry(main)> h = ActiveSupport::HashWithIndifferentAccess.new({a: 1})
=> {"a"=>1}
[4] pry(main)> x = h.reject {|_, v| v.nil? }
=> {"a"=>1}
[5] pry(main)> x.class
=> ActiveSupport::HashWithIndifferentAccess



[1] pry(main)> RUBY_VERSION
=> "2.1.1"
[2] pry(main)> require 'active_support/hash_with_indifferent_access'
=> true
[3] pry(main)> h = ActiveSupport::HashWithIndifferentAccess.new({a: 1})
=> {"a"=>1}
[4] pry(main)> x = h.reject {|_, v| v.nil? }
=> {"a"=>1}
[5] pry(main)> x.class
=> Hash