5 minutes with Elixir

My lightning talk from Brighton Ruby 2016 where we tour the highlights of Elixir and the surrounding ecosystem.

Transcript

1. 
   NJOVUFT
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   &MJYJS !BOEZQJLF
11. Hello Mike Hello Robert Hello Joe Erlang The Movie https://youtu.be/xrIjfIjssLE
15. defmodule Remark do def question?(remark) do String.ends_with?(remark, "?") end end
16. "Brighton Ruby" |> String.upcase |> String.split # => ["BRIGHTON", "RUBY"]
18. String.ends_with?("Brighton Ruby", "y") # same as: "Brighton Ruby" |> String.ends_with?("y")
20. ["Brighton", language] = ["Brighton", "Ruby"] "Ruby" ["Brighton", language] = ["London", "Ruby"] ** (MatchError) no match of right hand side…
22. def convert(units, :miles_to_km) do units * 1.6 end def convert(units, :km_to_miles) do units / 1.6 end IO.puts convert(16, :km_to_miles) # => 10.0
24. spawn fn -> IO.puts "Doing work in a process" end
26. pid = spawn(fn -> ... end) send pid, :message
28. defmodule Brighton do def hello do receive do { :say, text } -> IO.puts(text) { :think, text } -> Logger.debug(text) end end end pid = spawn(Brighton, :hello, []) send pid, { :say, "Hello Brighton Ruby" }
32. 051 Open Telephony Protocol
34. {:ok, account} = GenServer.start(BankAccount, 0) GenServer.cast(account, {:deposit, 50}) GenServer.cast(account, {:withdraw, 25})
35. balance = GenServer.call(account, :balance) # => 25
36. account = BankAccount.start(0) BankAccount.deposit(account, 50) BankAccount.withdraw(account, 25) BankAccount.balance(account) # => 25
38. Supervisor Supervisor Supervisor Supervisor Process Process Process Supervisor Process
41. Framework Throughput (req/s) Phoenix 179,685 Sinatra 30,561 Rails 11,903 https://gist.github.com/omnibs/e5e72b31e6bd25caf39a * Needs re-running on latest versions ⚡
42. http://www.phoenixframework.org/blog/the-road-to-2-million-websocket-connections
43. $ mix phoenix.new hello $ cd hello $ mix ecto.create $ mix phoenix.server
45. [info] GET / [debug] Processing by Hello.PageController.index/2 Parameters: %{} Pipelines: [:browser] [info] Sent 200 in 198µs
46. Router Controller View Template Smug Mode
47. scope "/", Hello do pipe_through :browser get "/", PageController, :index resources "/users", UserController end Router
48. defmodule Hello.PageController do use Hello.Web, :controller def index(conn, _params) do conn |> assign(:name, "Andy") |> render("index.html") end end Controller
49. View defmodule Hello.PageView do use Hello.Web, :view def message do "Hello #{@name}!" end end
51. Template <h1><%= message %></h1> <p>Brighton Ruby is Ace!</p>
53. Metaprogramming Ecto Doctests Enum IEX Comprehensions Hot upgrades T ail Call Optimisation Mix Hex Credo ExUnit [ head | tail ] Nodes Plug
56. elixir-lang.org exercism.io elixirschool.com elixirsips.com learnelixir.tv learnphoenix.tv elixirfountain.com codewars.com redfour.io
62. !BOEZQJLF
63. @andypike