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Fun with Elixir and the Erlang VM
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yawnt
October 05, 2013
2
250
Fun with Elixir and the Erlang VM
Introduction to Elixir, a metaprogramming friendly language that runs on the top of the Erlang VM.
yawnt
October 05, 2013
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Transcript
ELIXIR and the Erlang VM Fun with
YAWNT Hey, i’m on &
NODEJITSU I do at
LAZY Erlang concepts for the and the IMPATIENT
functional Erlang is a language
awesome As such, it has lots of features
data Functions are
REcursion It uses to solve problems
Guards
pattern matching
Referential transparency
PROCESSes... But
Unique ... make Erlang
concurrent Processes are
MESSAGES They use to communicate
picture shamelessly ripped from learnyousomEerlang
PEOPLE Processes are like
indEpendent They are
fault They are tolerant
isolated They are
distributed They are
BEAM Why a language on VM ? Recap
concurrent It is and DISTRIBUTED
FAULT tolerant It is
OTP It can use
None
OLD But Erlang is
macros Silly
syntax Clunky
flexibility Little
None
Modern What if we could use a language
None
$ git clone \ https://github.com/elixir-lang/elixir.git \ .elixir $ cd .elixir
$ make test $ echo "PATH=$HOME/.elixir/bin" >> .zshrc $ source .zshrc
“ Elixir is a metaprogrammable, functional language built atop the
Erlang VM. It is a dynamic language with hygIenic macros that leverages Erlang's ability to build concurrent, distributed, and fault-tolerant applications with hot code upgrades.“ @JosEValim
GOODNESS All the Erlang
PLUS
SYNTAX It has Ruby-inspired
defmodule Hi do def greetings do IO.puts "hi 33dev!" end
end
FRIENDLY It is DSL
defmodule ATest do use ExUnit.Case test "true should be true"
do assert(true == true) end end
MACROS It has powerful
defmodule MacroTest do defmacro if_not(pred, block) do quote do if(!unquote(pred))
do unquote(block) end end end def try_unless do if_not 1==2 do IO.puts "hey" end end end
protocols It has
defprotocol Blank do def blank?(data) end defimpl Blank, for: List
do def blank?([]), do: true def blank?(_), do: false end
Records It has sane
defrecord Trento, [people: nil, students: 0] do def get_people(city) do
city.people end end
“ Elixir is the son of ERLANG and RUBY, but
Ruby missed out and the real father is LisP.“ @DCH__
None
questions? or hit me up later
</talk> Thanks for listening
NEXT this talk Erlang/OTP in Action elixir-lang.org
Elixir google groups Programming Elixir