Use named args for boolean parameters.

gistfile1.rb

# Boolean paramters easily lose their context/meaning. Ex. car.drive(true)  # what is true?
#
# (1) If you have booleans, use named args.
# (2) If you dont have named args, use an options hash with fetch.
# (3) At the very worse, have the method take a meaningful string/symbol and determing truthiness from the passed value.


# BAD.  Hard to tell what the boolean means when calling the method.
#
# load_video('kitty-yawn.mp4', true)
# load_video('kitty-yawn.mp4', false)
def load_video(url, autoplay=true)
  video = open(url)
  video.play if autoplay
end

# 1) Named Args (Best)
#
# load_video('kitty-yawn.mp4', autoplay: true)
# load_video('kitty-yawn.mp4', autoplay: false)
def load_video(url:, autoplay: true)
  # ...
end

# 2) Options Hash
# 
# load_video('kitty-yawn.mp4', autoplay: true)
# load_video('kitty-yawn.mp4', autoplay: false)
def load_video(url:, options={})
  autoplay = options.fetch(:autoplay) { true }
  # ...
end

# 3) Meaningful value translated to bool by method.
#
# load_video('kitty-yawn.mp4', :autplay)
# load_video('kitty-yawn.mp4', :manual)
def load_video(url:, mode)
  autoplay = mode == :autoplay ? true : false
  # ...
end