Update from the Elixir team - 2018

Transcript

1. Update from the Elixir team elixir-lang.org
2. @whatyouhide
5. weedmaps.com/careers
6. Elixir v1.0 Sep 2014 > 180 contributors
7. Elixir v1.6 Jan 2018 > 730 contributors
8. • Follow two- to three-part commands: "Put your book away, brush your teeth, and then get in bed." • Recognize familiar word signs such as "STOP" • Better understand the concept of time • Count ten or more objects • Correctly name at least four colors and three shapes Elixir 1.0 is almost 4yo
9. Release every 6 months v1.5 → mid 2017 v1.6 → beg 2018 v1.7 →
10. IMPROVEMENTS IN v1.6
12. Code formatter
13. def foo ( a, b ) do a+ b end def foo(a, b) do a + b end
14. Feature complete formats code is configurable (for some things) supports formatting entire Mix projects (.formatter.exs)
16. Dynamic supervisor
17. simple_one_for_one confusing/mixed API documentation
18. opts = [strategy: :one_for_one] {:ok, sup} = DynamicSupervisor.start_link(opts) DynamicSupervisor.start_child( sup, {Agent, fn -> %{} end} )
19. "Just like simple_one_for_one but actually simple"
20. Documentation
21. @deprecated/@since @doc "Breaks a collection into chunks" @since "1.0.0" @deprecated "Use chunk_every/2 instead" def chunk(collection, chunk_size) do chunk_every(collection, chunk_size) end
22. @deprecated/@since @doc "Breaks a collection into chunks" @since "1.0.0" @deprecated "Use chunk_every/2 instead" def chunk(collection, chunk_size) do chunk_every(collection, chunk_size) end
23. @deprecated/@since @doc "Breaks a collection into chunks" @since "1.0.0" @deprecated "Use chunk_every/2 instead" def chunk(collection, chunk_size) do chunk_every(collection, chunk_size) end
24. Library guidelines
25. Compatibility table with Erlang/OTP
26. Table of deprecations
27. UX
28. --slowest N $ mix test --slowest 2 Finished in 1.4 seconds Top 3 slowest (0.9s), 61.0% of total time: * test client suicide (602.8ms) (RedixTest) * test unable to connect (201.2ms) (RedixTest) * test timeouts (101.8ms) (RedixTest)
29. 10-20% compilation speedup with OTP21 definitely thanks to us
30. defguard
31. defguard is_drinking_age(age) when age >= 21 def serve_drink(%User{age: age}) when is_drinking_age(age) do # Serve the drink end
32. FUTURE
34. StreamData data generation property-based testing +
35. Enum.take(StreamData.integer(), 2) #=> [1, -2]
36. use ExUnitProperties
 property "bin1 <> bin2 always starts with bin1" do check all bin1 <- binary(), bin2 <- binary() do assert String.starts_with?(bin1 <> bin2, bin1) end end
37. only stateless testing... ...but discussion started for stateful testing
38. __STACKTRACE__
39. try do apply(mod, fun, args) catch :error, val -> {:error, {val, __STACKTRACE__}} end
40. Configuration and releases
41. Solve problems with Mix.Config Streamline releases and integrate with Mix
42. Docs chunk
43. EEP 48 documentation storage and format
44. Standard API for all BEAM languages Access to docs in the shell + (Elixir already has this)
45. RESEARCH PROJECTS
46. Google Summer of Code
47. StreamData + typespecs
48. Enum.take(from_type(timeout/0), 3) #=> [0, :infinity, 927] @type timeout() :: non_neg_integer() | :infinity
49. check all arg1 <- from_type(timeout/0) do result = my_fun(arg1) assert is_integer(result) end @spec my_fun(timeout()) :: integer()
50. ElixirBench
51. mix dialyzer
52. TensorflEx: Tensorflow bindings for Elixir
53. github.com/elixir-lang/elixir
54. elixir-lang.org