Food Functional

food.ex

defmodule Food do
  def reduce([], _), do: "😵"
  def reduce(foods, f), do: Enum.reduce(foods, f)
  
  def eat(_, "💀"), do: "💀"
  def eat(stuff, _) do
    if is_food(stuff), do: "💩", else: "💀"
  end
  
  def is_food(_), do: true # implement yourself
end

# Usage
import Food
reduce([], &eat/2) #=> "😵"