Elixir

Transcript

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   @elixirlang / elixir-lang.org Monday, November 19, 2012

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   @josevalim Monday, November 19, 2012

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   Monday, November 19, 2012

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   Why? Monday, November 19, 2012

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   case #1 Monday, November 19, 2012

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   Switch Switch Monday, November 19, 2012

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   Switch Browser Endpoint Server Monday, November 19, 2012

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   Server Browser Monday, November 19, 2012

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   •Web sockets •API streaming •Server sent events Server Monday, November

   19, 2012
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    case #2 Multi-core Monday, November 19, 2012

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    Server Server Server Server Monday, November 19, 2012

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    50 cores $2600 Monday, November 19, 2012

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    Server Monday, November 19, 2012

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    case #3 Doing it live! Monday, November 19, 2012

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    http://blog.whatsapp.com/index.php/2012/01/1-million-is-so-2011/ 2 million connections on a single node Monday, November

    19, 2012
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    http://stackoverflow.com/questions/1636455/where-is-erlang-used-and-why Monday, November 19, 2012

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    Goals Monday, November 19, 2012

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    goal #1 Productivity Monday, November 19, 2012

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    Everything is an expression Monday, November 19, 2012

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    -module(my_module). some_function(Foo) -> % ... other_function(Bar) -> % ... erlang

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    -module(my_module). % won’t compile io:put_chars("hello"). some_function(Foo) -> % ... other_function(Bar)

    -> % ... erlang Monday, November 19, 2012
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    defmodule MyModule do def some_function(foo) do # ... end IO.puts

    "hello" def other_function(bar) do # ... end end elixir Monday, November 19, 2012
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    Macros Monday, November 19, 2012

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    :foo - atoms/symbols { 1, 2, 3 } - tuples

    [ 1, 2, 3 ] - lists Monday, November 19, 2012
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    is_atom(:foo) function line args atom { :is_atom, 1, [:foo] }

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    1 + 2 function line args { :+, 1, [1,2]

    } Monday, November 19, 2012
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    defmacro unless(expr, opts) do quote do if(!unquote(expr), unquote(opts)) end end

    unless(true, do: exit()) elixir Monday, November 19, 2012
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    Domain Specific Languages Monday, November 19, 2012

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    defmodule MathTest do use ExUnit.Case test "basic operations" do assert

    1 + 1 == 2 end end elixir Monday, November 19, 2012
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    defmodule MathTest do use ExUnit.Case def test_basic_operations do assert 1

    + 1 == 2 :ok end end elixir Monday, November 19, 2012
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    assert 1 + 1 == 2 { :==, 5, [1

    + 1, 2] } function line args Monday, November 19, 2012
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    # assert 1 + 1 == 2 defmacro assert({ :=~,

    line, [l,r] }) do # ... end defmacro assert({ :==, line, [l,r] }) do # ... end defmacro assert(default) do # ... end Monday, November 19, 2012
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    goal #2 Extensibility Monday, November 19, 2012

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    -module(json). to_json(Item) when is_list(Item) -> % ... to_json(Item) when is_binary(Item)

    -> % ... to_json(Item) when is_number(Item) -> % ... erlang Monday, November 19, 2012
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    Protocols Monday, November 19, 2012

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    defprotocol JSON do def to_json(item) end JSON.to_json(item) elixir Monday, November

    19, 2012
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    defimpl JSON, for: List do # ... end elixir defimpl

    JSON, for: Binary do # ... end defimpl JSON, for: Number do # ... end Monday, November 19, 2012
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    defimpl JSON, for: Array do # ... end elixir Monday,

    November 19, 2012
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    goal #3 Compatibility Monday, November 19, 2012

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    Monday, November 19, 2012

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    DISTRIBUTED FAULT-TOLERANT APPLICATIONS WITH HOT-CODE SWAPPING Monday, November 19, 2012

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    There is no conversion cost for calling Erlang from Elixir

    and vice-versa Monday, November 19, 2012
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    • UTF-8 binaries strings • Keyword arguments • First-class documentation

    • First-class regular expressions • Zero-index access • ... Monday, November 19, 2012
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    Example Monday, November 19, 2012

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    defmodule MathTest do use ExUnit.Case, async: true test "basic operations"

    do assert 1 + 1 == 2 end end elixir Monday, November 19, 2012
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    1 MathTest 2 SystemTest 3 ... 4 ... 5 ...

    6 ... 7 ... 8 ... ExUnit. Runner ExUnit. Formatter Monday, November 19, 2012
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    1 MathTest 2 SystemTest 3 ... 4 ... 5 ...

    6 ... 7 ... 8 ... ExUnit. Runner run ExUnit. Formatter Monday, November 19, 2012
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    1 MathTest 2 SystemTest 3 ... 4 ... 5 ...

    6 ... 7 ... 8 ... ExUnit. Runner run ExUnit. Formatter Monday, November 19, 2012
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    1 MathTest 2 SystemTest 3 ... 4 ... 5 ...

    6 ... 7 ... 8 ... ExUnit. Runner run ExUnit. Formatter Monday, November 19, 2012
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    1 MathTest 2 SystemTest 3 ... 4 ... 5 ...

    6 ... 7 ... 8 ... ExUnit. Runner done ExUnit. Formatter info Monday, November 19, 2012
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    1 MathTest 2 SystemTest 3 ... 4 ... 5 ...

    6 ... 7 ... 8 ... ExUnit. Runner ExUnit. Formatter run Monday, November 19, 2012
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    127.0.0.9 127.0.0.3 1 MathTest 2 SystemTest 3 ... 4 ...

    5 ... 6 ... 7 ... 8 ... ExUnit. Runner ExUnit. Formatter Monday, November 19, 2012
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    127.0.0.9 127.0.0.3 1 MathTest 2 SystemTest 3 ... 4 ...

    5 ... 6 ... 7 ... 8 ... ExUnit. Runner ExUnit. Formatter ExUnit. Supervisor Monday, November 19, 2012
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    Roadmap Monday, November 19, 2012

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    • v0.6 (Aug/12) Erlang language compatibility • v0.8 (Dec/12) Erlang

    apps support • Dynamo (xx/13) Web framework • v0 (Jan/11) Monday, November 19, 2012
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    Monday, November 19, 2012

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    @elixirlang / elixir-lang.org Monday, November 19, 2012