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Elixir
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Plataformatec
November 18, 2012
Technology
17
11k
Elixir
This talk highlights the reason, goals and roadmap behind Elixir,
http://elixir-lang.org
Plataformatec
November 18, 2012
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Transcript
@elixirlang / elixir-lang.org Monday, November 19, 2012
@josevalim Monday, November 19, 2012
Monday, November 19, 2012
Why? Monday, November 19, 2012
case #1 Monday, November 19, 2012
Switch Switch Monday, November 19, 2012
Switch Browser Endpoint Server Monday, November 19, 2012
Server Browser Monday, November 19, 2012
•Web sockets •API streaming •Server sent events Server Monday, November
19, 2012
case #2 Multi-core Monday, November 19, 2012
Server Server Server Server Monday, November 19, 2012
50 cores $2600 Monday, November 19, 2012
Server Monday, November 19, 2012
case #3 Doing it live! Monday, November 19, 2012
http://blog.whatsapp.com/index.php/2012/01/1-million-is-so-2011/ 2 million connections on a single node Monday, November
19, 2012
http://stackoverflow.com/questions/1636455/where-is-erlang-used-and-why Monday, November 19, 2012
Goals Monday, November 19, 2012
goal #1 Productivity Monday, November 19, 2012
Everything is an expression Monday, November 19, 2012
-module(my_module). some_function(Foo) -> % ... other_function(Bar) -> % ... erlang
Monday, November 19, 2012
-module(my_module). % won’t compile io:put_chars("hello"). some_function(Foo) -> % ... other_function(Bar)
-> % ... erlang Monday, November 19, 2012
defmodule MyModule do def some_function(foo) do # ... end IO.puts
"hello" def other_function(bar) do # ... end end elixir Monday, November 19, 2012
Macros Monday, November 19, 2012
:foo - atoms/symbols { 1, 2, 3 } - tuples
[ 1, 2, 3 ] - lists Monday, November 19, 2012
is_atom(:foo) function line args atom { :is_atom, 1, [:foo] }
Monday, November 19, 2012
1 + 2 function line args { :+, 1, [1,2]
} Monday, November 19, 2012
defmacro unless(expr, opts) do quote do if(!unquote(expr), unquote(opts)) end end
unless(true, do: exit()) elixir Monday, November 19, 2012
Domain Specific Languages Monday, November 19, 2012
defmodule MathTest do use ExUnit.Case test "basic operations" do assert
1 + 1 == 2 end end elixir Monday, November 19, 2012
defmodule MathTest do use ExUnit.Case def test_basic_operations do assert 1
+ 1 == 2 :ok end end elixir Monday, November 19, 2012
assert 1 + 1 == 2 { :==, 5, [1
+ 1, 2] } function line args Monday, November 19, 2012
# 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
goal #2 Extensibility Monday, November 19, 2012
-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
Protocols Monday, November 19, 2012
defprotocol JSON do def to_json(item) end JSON.to_json(item) elixir Monday, November
19, 2012
defimpl JSON, for: List do # ... end elixir defimpl
JSON, for: Binary do # ... end defimpl JSON, for: Number do # ... end Monday, November 19, 2012
defimpl JSON, for: Array do # ... end elixir Monday,
November 19, 2012
goal #3 Compatibility Monday, November 19, 2012
Monday, November 19, 2012
DISTRIBUTED FAULT-TOLERANT APPLICATIONS WITH HOT-CODE SWAPPING Monday, November 19, 2012
There is no conversion cost for calling Erlang from Elixir
and vice-versa Monday, November 19, 2012
• UTF-8 binaries strings • Keyword arguments • First-class documentation
• First-class regular expressions • Zero-index access • ... Monday, November 19, 2012
Example Monday, November 19, 2012
defmodule MathTest do use ExUnit.Case, async: true test "basic operations"
do assert 1 + 1 == 2 end end elixir Monday, November 19, 2012
1 MathTest 2 SystemTest 3 ... 4 ... 5 ...
6 ... 7 ... 8 ... ExUnit. Runner ExUnit. Formatter Monday, November 19, 2012
1 MathTest 2 SystemTest 3 ... 4 ... 5 ...
6 ... 7 ... 8 ... ExUnit. Runner run ExUnit. Formatter Monday, November 19, 2012
1 MathTest 2 SystemTest 3 ... 4 ... 5 ...
6 ... 7 ... 8 ... ExUnit. Runner run ExUnit. Formatter Monday, November 19, 2012
1 MathTest 2 SystemTest 3 ... 4 ... 5 ...
6 ... 7 ... 8 ... ExUnit. Runner run ExUnit. Formatter Monday, November 19, 2012
1 MathTest 2 SystemTest 3 ... 4 ... 5 ...
6 ... 7 ... 8 ... ExUnit. Runner done ExUnit. Formatter info Monday, November 19, 2012
1 MathTest 2 SystemTest 3 ... 4 ... 5 ...
6 ... 7 ... 8 ... ExUnit. Runner ExUnit. Formatter run Monday, November 19, 2012
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
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
Roadmap Monday, November 19, 2012
• 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
Monday, November 19, 2012
@elixirlang / elixir-lang.org Monday, November 19, 2012