DEV Community

Discussion on: Daily Challenge #27 - Unlucky Days

View post
Collapse
 
brightone profile image
Oleksii Filonenko •

Elixir:

defmodule Unlucky do
  def days(year) do
    1..12
    |> Enum.map(&Date.from_erl!({year, &1, 13}))
    |> Enum.filter(&(Date.day_of_week(&1) == 5))
    |> Enum.count()
  end
end