Example IV Refactored for the Post - avoiding-conditionals

sample_08.rb

def save(state, params)
  state_lambda = {
    in_progress: -> () { save_in_progress(params) },
    done:        -> () { save_done(params) },
    on_review:   -> () { save_on_review(params, :some_extra_param) }
  }

  state_lambda[state].call()
end

params = { a: 1, b: 2, c: 3 }
save(:in_progress, params)    #=> "called save_in_progress"
save(:done, params)           #=> "called save_done"
save(:on_review, params)      #=> "called save_on_review with extract_params"