Building a game with Elixir and Elm

Building a game with Elixir and Elm

Transcript

1. Hi ! I'm Paulo
2. Born
3. Live
4. Work
5. Like
6. Like
7. Like
8. Like
9. Functional Programming Fits my mental map Many languages have it It feels right for me
10. Elixir Enum.map(["1", "2", "3"], &(String.to_integer &1)) => [1, 2, 3]
11. Ruby ['1', '2', '3'].map(&:to_i) => [1, 2, 3]
12. Javascript ['1', '2', '3'].map(parseInt) => [ 1, NaN, NaN ]
13. Couldn't apply my mental models directly ! Note: Javascript community ❤ Note2: Underscore.js ❤ Note3: Ramda ❤ Note4: React ❤
14. Maybe I should try to use another language? Elm Clojurescript PureScript ElixirScript
15. I used Elm to make a game
17. Elixir on server Phoenix websockets OTP Also matched my mental model
18. updateFlappy : Game -> ( Game, Cmd Msg ) updateFlappy game = game |> gravity |> physics |> upperLimit |> checkPipeColision |> updatePipes |> updateScore
19. updateScore : Game -> ( Game, Cmd Msg ) updateScore game = let score = game.pipes |> List.filter (\pipe -> pipe.passed == True) |> List.length |> (\x -> x // 2) in if (game.score == score) then ( game, Cmd.none ) else { game | score = score } |> update SendScore
20. Server top_players = players |> Enum.sort(fn(p1, p2) -> p1.score > p2.score end) |> Enum.take(3)
21. Wrapping up I'm not confortable with JS If you're also not, try other languages Make games, they're awesome https://paulodiniz.github.io/flappy-bird/
22. Thank you twitter: @paulodiniz github: paulodiniz