* and ** operator

main.rb

# * operator
def order_pizza(*pizzas)
  return pizzas
end 
puts order_pizza('Bora', 'Tolga', 'Sevil')

# * operator - into Object
def frameworks(*lovers)
  return lovers
end

we_love = {
  "name": "React",
}

you_love = {
  "name": "Vue",
}

puts frameworks(we_love, you_love)

# ** operator

def print_list_of(**books_and_articles)
  books_and_articles.each do |book, article|
    puts book
    puts article
  end
end
# As an argument, we define a hash in which we will write books and articles.
books_and_articles_we_love = {
  "Ruby on Rails 4": "What is webpack?",
  "Ruby essentials": "What is Ruby Object Model?",
  "Javascript essentials": "What is Object?"
}
print_list_of(books_and_articles_we_love)