Example beer recipe class in Ruby

beer_recipes.rb

# an abstract beer recipe
class BeerRecipe
  attr_accessor :name, :original_gravity, :terminal_gravity, :color, :alcohol
end

# create an empty list to store your recipes
recipes = []

# create a concrete beer recipe
pilsner = BeerRecipe.new
pilsner.name = "182 Bohemian Pilsner"
pilsner.original_gravity = 1.044
pilsner.color = 2.08
pilsner.bitterness = 36.8
pilsner.alcohol = 4.1

# add the recipe to your list of recipes
recipes.push pilsner

# inspect the list of recipes
puts recipes.inspect