Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Why Elixir? (Intro to Elixir)
Search
Ventsislav Nikolov
May 22, 2017
Technology
2
160
Why Elixir? (Intro to Elixir)
A brief introduction of Elixir. Level: beginners.
Ventsislav Nikolov
May 22, 2017
Tweet
Share
More Decks by Ventsislav Nikolov
See All by Ventsislav Nikolov
Building Multiplayer Real-Time Game with Elixir and Phoenix
ventsislaf
4
2.5k
Other Decks in Technology
See All in Technology
Autonomous Database - Dedicated 技術詳細 / adb-d_technical_detail_jp
oracle4engineer
PRO
4
10k
RSCの時代にReactとフレームワークの境界を探る
uhyo
10
3.5k
スマートファクトリーの第一歩 〜AWSマネージドサービスで 実現する予知保全と生成AI活用まで
ganota
2
320
初めてAWSを使うときのセキュリティ覚書〜初心者支部編〜
cmusudakeisuke
1
280
dbt開発 with Claude Codeのためのガードレール設計
10xinc
2
1.3k
データ分析エージェント Socrates の育て方
na0
6
2.4k
自作JSエンジンに推しプロポーザルを実装したい!
sajikix
1
190
新規プロダクトでプロトタイプから正式リリースまでNext.jsで開発したリアル
kawanoriku0
1
210
[ JAWS-UG 東京 CommunityBuilders Night #2 ]SlackとAmazon Q Developerで 運用効率化を模索する
sh_fk2
3
460
会社紹介資料 / Sansan Company Profile
sansan33
PRO
6
380k
COVESA VSSによる車両データモデルの標準化とAWS IoT FleetWiseの活用
osawa
1
400
Android Audio: Beyond Winning On It
atsushieno
0
2.9k
Featured
See All Featured
Distributed Sagas: A Protocol for Coordinating Microservices
caitiem20
333
22k
Rebuilding a faster, lazier Slack
samanthasiow
83
9.2k
Unsuck your backbone
ammeep
671
58k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
162
15k
Docker and Python
trallard
46
3.6k
Building a Modern Day E-commerce SEO Strategy
aleyda
43
7.6k
Building a Scalable Design System with Sketch
lauravandoore
462
33k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
285
14k
Why Our Code Smells
bkeepers
PRO
339
57k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
252
21k
No one is an island. Learnings from fostering a developers community.
thoeni
21
3.4k
Save Time (by Creating Custom Rails Generators)
garrettdimon
PRO
32
1.6k
Transcript
WHY ELIXIR? Elixir Sofia Meetup May 2017
WHY ELIXIR? INTRO TO ELIXIR
Ventsislav Nikolov @ventsislaf
DISCLAIMER NO GIFs
None
WHAT IS ELIXIR?
• functional programming language • compiles to erlang bytecode •
immutable data • dynamically typed • concurrency, distribution, fault tolerance • hot code swapping
DATA TYPES (NOT ALL) 1_000_000 # Integer 314159.0e-5 # Float
:apple # Atom "Jon Snow" # String {:error, 404} # Tuple [1, 2, 3] # (Linked) List %{name: "Jon", age: 21} # Map
MODULES AND FUNCTIONS
ANONYMOUS FUNCTIONS add = fn(a, b) -> a + b
end add.(2, 5) # => 7
MODULES defmodule Math do def add(a, b) do a +
b end defp multiply(a, b) do a * b end end # warning: function multiply/2 is unused Math.add(2, 5) # => 7 Math.multiply(2, 5) # ** (UndefinedFunctionError) function Math.multiply/2 is undefined or private
IMMUTABILITY
colors = ["green", "apple", "red"] List.delete(colors, "apple") # => ["green",
"red"] colors # => ["green", "apple", "red"]
PATTERN MATCHING
= x = 1 # => 1 1 = x
# => 1 2 = x # ** (MatchError) no match of right hand side value: 1 x = 2 # => 2
DECOMPOSITION [x, y] = [1, 2] # x => 1,
y => 2 [1, x] = [1, 2] # x => 2 [_, x] = [1, 2] # x => 2 [head | tail] = [1, 2, 3] # head => 1, tail => [2, 3] %{name: name} = %{name: "Jon Snow", age: 21} # name => "Jon Snow"
RECURSION
def sum([]) do 0 end def sum([head | tail]) do
head + sum(tail) end
PIPE OPERATOR
Enum.sort(String.codepoints(String.downcase(word)))
lowercase = String.downcase(word) chars = String.codepoints(lowercase) ordered = Enum.sort(chars)
word |> String.downcase() |> String.codepoints() |> Enum.sort()
Elixir + Erlang = ❤
# Erlang rand:uniform(10). # Elixir :rand.uniform(10)
CONCURRENCY
PROCESSES (not OS) spawn fn -> IO.puts "Hello from another
process" end
LIGHTWEIGHT • created for couple of microseconds • 1-2 KB
initial memory footprint • up to hundreds of millions processes per VM
ISOLATION name = "Jon Snow" spawn fn -> IO.puts "Hello,
#{name}" end
MESSAGES pid = spawn fn -> receive do msg ->
IO.puts "received a message: #{msg}" end end send pid, "You know nothing, Jon Snow."
msg 1 msg 2 msg 3 mailbox
FAULT TOLERANCE
:one_for_one :one_for_all
DISTRIBUTION
None
$ iex --name one@host $ iex --name two@host $ iex
--name three@host # in node one iex> Node.connect :two@host iex> Node.connect :three@host iex> Node.list # => [:two@host, :three@host] # in node two iex> Node.list # => [:one@host, :three@host] iex> Node.spawn :three@host, fn -> IO.puts("hello") end
TOOLING
IEx (demo) $ iex iex> 2 + 5 7
MIX mix new app_name mix compile mix test mix deps.get
mix hex.publish
OBSERVER :observer.start
None
WHERE TO GO NEXT?
None
None
None
None
THANK YOU!