kwargs_and_hash_like_objects.rb

class DefinitelyNotHash
  def initialize(val)
    @val = val
  end
end

class HashIsh
  def initialize(val)
    @val = val
  end

  def to_hash
    { value: @val }
  end
end

class NotQuiteHash
  def initialize(val)
    @val = val
  end

  def to_h
    { value: @val }
  end
end

def test(*args, **kwargs)
  puts "ARGS:   #{args.inspect}"
  puts "KWARGS: #{kwargs.inspect}"
end


# pry
[1] pry(main)> require_relative 'test'
=> true
[2] pry(main)> test NotHash.new("asdf")
ARGS:   [#<NotHash:0x0000000153c4e3f8 @val="asdf">]
KWARGS: {}
=> nil
[3] pry(main)> test NotQuiteHash.new("asdf")
ARGS:   [#<NotQuiteHash:0x0000000153c24620 @val="asdf">]
KWARGS: {}
=> nil
[4] pry(main)> test HashIsh.new("asdf")
ARGS:   []
KWARGS: {:value=>"asdf"}
=> nil