Ryan Winchester ryanwinchester

Goals

I come from the land of PHP and JavaScript, with very little Ruby experience. I have seen quite a few posts around the interwebs introducing Elixir from a Rubyist's perspective but I haven't really seen any from a perspective I can relate to. The syntax of Elixir is kind of foreign to most people outside of Ruby-land, so I hope to help push people a little bit over the initial hump with some examples using PHP and JavaScript (ES2015) along with the Elixir examples.

My goal with this post is to help introduce the syntax as well as a shallow introduction to immutability and how we use recursion instead of loops.

If you have Elixir installed, you can paste or type examples into IEx (interactive elixir). Start IEx shell by just typing iex into your terminal.

Syntax and Semantics

CHAPTER 1 – Take the Red Pill (cringe)

The Elixir programming language wraps functional programming with im mutable state and an actor-based approach to concurrency in a tidy, modern syntax. And it runs on the industrial-strength, high-performance, distributed Erlang VM. But what does all that mean?

It means you can stop worrying about many of the difficult things that currently consume your time. You no longer have to think too hard about protecting your data consistency in a multithreaded environment. You worry less

Install the CodeDeploy agent

On the EC2 Instance:

sudo apt-get update

sudo apt-get install wget

sudo apt-get install ruby

	defmodule PriorityQueue do
	@moduledoc """
	A priority queue in Elixir.
	"""

	@type priority :: integer() \| nil

	@type element :: any()

	@type t :: %__MODULE__{set: :gb_sets.set({priority(), element()})}

	defmodule Bench do
	def orig(payload, mask) do
	maskstream = <<mask::32>> \|> :binary.bin_to_list() \|> Stream.cycle()

	payload
	\|> :binary.bin_to_list()
	\|> Enum.zip(maskstream)
	\|> Enum.map(fn {x, y} -> Bitwise.bxor(x, y) end)
	\|> :binary.list_to_bin()
	end

	defmodule AppWeb.ItemsLive do
	use AppWeb, :live_view

	import Bitwise

	@interval_ms 3

	@impl true
	def mount(_params, _session, socket) do
	# Send a `:tick` message to this process at the specified interval.

	defmodule TwilioSignature do
	@moduledoc """
	Twilio signatures module.
	"""

	@doc """
	Generate the Twilio signature from a request.

	See: https://www.twilio.com/docs/usage/security#validating-requests

	Mute these words in your settings here: https://twitter.com/settings/muted_keywords

	ActivityTweet
	generic_activity_highlights
	generic_activity_momentsbreaking
	RankedOrganicTweet
	suggest_activity
	suggest_activity_feed
	suggest_activity_highlights
	suggest_activity_tweet

	[
	0,
	1,
	1,
	2,
	3,
	5,
	8,
	13,
	21,