DEV Community

Keyword Arguments of Ruby makes code more clear

chenge on December 26, 2018

In this video the speaker demoed the pros of KWArgs. In the pic, upper code is obviously more clear. So when should you use it? I think, when i...

Read full post

Edison Yap • Dec 27 '18 • Edited

Didn't watch the video, but what I find interesting is that keyword arguments did not exist until Ruby 2.0, which means before Ruby 2.0, there's a totally different way to do hack it, and you'll sometimes see this in the wild :) (I've encountered this in Rails' DateTime library)


# Ruby 2.0
def method(first:, second:)
  puts "First: #{first}, Second: #{second}"
end

# Ruby 1.9
def method(options={})
  first = options.fetch(:first)
  second = options.fetch(:second)
  puts "First: #{first}, Second: #{second}"
end