MethodQuery gives you the ability to check for the truthiness of a key via method calls. Note that it will return false if the key is set to a non-truthful value, not if the key isn‘t set at all. Use key? for checking if a key has been set.

MethodQuery will check against both string and symbol names of the method for existing keys. It also patches respond_to to appropriately detect the query methods.

@example

  class MyHash < Hash
    include Hashie::Extensions::MethodQuery
  end

  h = MyHash.new
  h['abc'] = 123
  h.abc? # => true
  h['def'] = nil
  h.def? # => false
  h.hji? # => NoMethodError