ruby-splat.rb

module Kernel
  def to_hash
    new_hash = self.instance_variables.reduce({}) do |hash, instance_var|
      hash[instance_var.to_s[1..-1].to_sym] = self.instance_variable_get instance_var
      hash
    end
  end
end

# Then you can pass it a list of symbols.
# Then for your method:
def some_method name:, weight: 
    puts "#{name} weighs #{weight}"
end

class Dog
  attr_reader :name, :weight
  def initialize name:,weight: 
    @name = name
    @weight = weight
  end
end

a_dog = Dog.new name: 'fido', weight: '7kg'

some_method(**a_dog)  # Works great!

class CockerSpanel < Dog
  def initialize name:,weight:,color:
    super name: name, weight: weight
    @color = color
  end
end

another_dog = CockerSpanel.new name: 'Jessie', weight: '5kg', color: 'black'

some_method **another_dog

exit # the below works.

# It's not perfect but it's pretty close.
# Should def be a native implementation though.
# Basically ** is used for named arguments (where you pass a hash).

def x(name:, age:)
  puts "#{name} #{age}"
end

attributes = {name: 'Test', age: 55}

x(**attributes)

Sorted out the issues.

Fixed an issue with hash/object passing to other_splat