Contents

defmodule Allergies do
  import Bitwise

  @allergens [
    "eggs",
    "peanuts",
    "shellfish",
    "strawberries",
    "tomatoes",
    "chocolate",
    "pollen",
    "cats"
  ]

  def list(flags) do
    Enum.with_index(@allergens)
    |> Enum.filter(&flagged?(flags, &1))
    |> Enum.map(fn {item, _} -> item end)
  end

  def allergic_to?(flags, item) do
    Enum.member?(list(flags), item)
  end

  defp flagged?(flags, {_, index}) do
    (flags &&& 1 <<< index) > 0
  end
end

Version data entries

131 entries across 131 versions & 1 rubygems

Version	Path
trackler-2.2.1.98	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.97	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.96	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.95	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.94	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.93	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.92	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.91	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.90	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.89	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.88	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.87	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.86	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.85	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.84	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.83	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.82	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.81	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.80	tracks/elixir/exercises/allergies/example.exs
trackler-2.2.1.79	tracks/elixir/exercises/allergies/example.exs