Ruby idiomatic way to return a boolean -

is there more idiomatic way me return boolean in #survey_completed? how did things in c#, , have felt last ternary clause return false redundant, perhaps ruby has better way of doing this?

this how code looks like:

  def survey_completed?     self.survey_completed_at ? true: false   end    def survey_completed_at     # seeing survey submitted or nothing, time last response persisted     # when survey completed     last_response = self.responses.last     if last_response       last_response.created_at     end   end 

you can use double negation:

def survey_completed?   !!survey_completed_at end