@elixirlang / elixir-langs3-eu-west-1.amazonaws.com/presentations2014/12_presentation.pdf · Now we...

@elixirlang / elixir-lang.orgWednesday, May 14, 14

Rails 2.2threadsafe

Wednesday, May 14, 14

Sapir-Whorfhypothesis


The structure of a language affects the ways in which its

respective speakers conceptualize their world


zuzuvapaburu

dambu

http://en.wikipedia.org/wiki/Himba_people







“Threadsafe”


Functionalprogramming



• Explicit instead of implicit state


• Explicit instead of implicit state• Transformation instead of mutation



• Functional


• Functional• Concurrent


• Functional• Concurrent• Distributed



Switch


Switch


Switch


Switch


Switch

Switch


Switch

Browser

Endpoint

Server


http://stackoverflow.com/questions/1636455/where-is-erlang-used-and-why






http://blog.whatsapp.com/index.php/2012/01/1-million-is-so-2011/

2 million connections on a single node


Intel Xeon CPU X5675 @ 3.07GHz24 CPU - 96GBUsing 40% of CPU and Memory


Idioms


Sequentialcode


Sequentialcode

elixir


Sequentialcode

elixir


elixir


elixir


elixir


WebDB MailerStats


WebDB MailerStats

Sup


WebDB MailerStats

Sup

App


• Processes• Supervisors• Applications• Message passing• “Fail fast”



• Isolated• Concurrent• Fault tolerant


• Isolated• Concurrent• Fault tolerant• Distributed?


elixir


app2@localapp1@local

elixir



• Compatibility


• Compatibility• Extensibility


• Compatibility• Extensibility • Productivity


goal #1

Compatibility


goal #2

Extensibility


Now we need to go meta. We should now think of a language design as being a

pattern for language designs. A tool for making more tools of the same kind.

Guy Steele - “Growing a language”at ACM OOPSLA 1998


defmacro unless(expr, opts) do quote do if(!unquote(expr), unquote(opts)) endend

unless(is_number(x), do: raise(“oops”))

elixir


defmodule MathTest do use ExUnit.Case

test "basic operations" do assert 1 + 1 == 2 endend

elixir



from p in Post,where: p.published_at < now and p.author == “José”,order: p.created_at

elixir


goal #3

Productivity


Focus on tooling.Demo time!


elixir-lang.orgWednesday, May 14, 14


GeeConValim2014




@elixirlang / elixir-lang.orgWednesday, May 14, 14

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