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defmodule Poker do | |
@deck ~w( | |
A♣ 2♣ 3♣ 4♣ 5♣ 6♣ 7♣ 8♣ 9♣ 10♣ J♣ Q♣ K♣ | |
A◆ 2◆ 3◆ 4◆ 5◆ 6◆ 7◆ 8◆ 9◆ 10◆ J◆ Q◆ K◆ | |
A♠ 2♠ 3♠ 4♠ 5♠ 6♠ 7♠ 8♠ 9♠ 10♠ J♠ Q♠ K♠ | |
A♥ 2♥ 3♥ 4♥ 5♥ 6♥ 7♥ 8♥ 9♥ 10♥ J♥ Q♥ K♥ | |
) | |
def deck, do: Enum.with_index(@deck) | |
def deal(hand_count \\ 1) do | |
deck() | |
|> Enum.shuffle() | |
|> Enum.chunk_every(5) | |
|> Enum.take(hand_count) | |
end | |
def straight?(hand) do | |
hand | |
|> Enum.map(&(elem(&1, 1) |> rem(13))) | |
|> Enum.sort() | |
|> Enum.reduce(fn | |
x, {n, seq?} -> {x, seq? && x == n + 1} | |
x, n -> {x, x == n + 1} | |
end) | |
|> elem(1) | |
end | |
def flush?(hand) do | |
hand | |
|> Enum.map(&(elem(&1, 0) |> String.last())) | |
|> Enum.uniq() | |
|> (&(Enum.count(&1) === 1)).() | |
end | |
def straight_flush?(hand), do: straight?(hand) and flush?(hand) | |
end |
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