ryanwinchester

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

ryanwinchester

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

ryanwinchester

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

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ryanwinchester

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

ryanwinchester

import Enum;c=String.replace("example string",~r/[\W_]/,"")|>String.split("",trim: true);zip(c,slice(c,1..-1))|>map(fn{a,b}->a<>b end)|>join(" ") end end

ryanwinchester

Install the CodeDeploy agent

On the EC2 Instance:

sudo apt-get update

sudo apt-get install wget

sudo apt-get install ruby

ryanwinchester

# Generate Private Key and Certificate using RSA 256 encryption (4096-bit key)
openssl req -x509 -newkey rsa:4096 -keyout privatekey.pem -out certificate.pem -days 365
# Alternatively, setting the "-newkey" parameter to "rsa:2048" will generate a 2048-bit key.

# Generate PKCS#12 (P12) file for cert; combines both key and certificate together
openssl pkcs12 -export -inkey privatekey.pem -in certificate.pem -out cert.pfx

# Generate SHA256 Fingerprint for Certificate and export to a file
openssl x509 -noout -fingerprint -sha256 -inform pem -in certificate.pem >> fingerprint.txt

ryanwinchester

#!/bin/bash

###### PICK ONE OF THE TWO FOLLOWING ######

# OPTION ONE: RSA key. these are very well-supported around the internet.
# you can swap out 4096 for whatever RSA key size you want. this'll generate a key
# with password "xxxx" and then turn around and re-export it without a password,
# because genrsa doesn't work without a password of at least 4 characters.
#
# some appliance hardware only works w/2048 so if you're doing IOT keep that in

ryanwinchester

#!/bin/sh

set -e

BEAM_PORT=32815
EPMD_PORT=4369
COOKIE='cookiestring'

ssh -f -o ExitOnForwardFailure=yes \
    -L "$EPMD_PORT:localhost:$EPMD_PORT" \

ryanwinchester

defmodule Poker do
  @deck ~w(
    A♣ 2♣ 3♣ 4♣ 5♣ 6♣ 7♣ 8♣ 9♣ 10♣ J♣ Q♣ K♣
    A◆ 2◆ 3◆ 4◆ 5◆ 6◆ 7◆ 8◆ 9◆ 10◆ J◆ Q◆ K◆
    A♠ 2♠ 3♠ 4♠ 5♠ 6♠ 7♠ 8♠ 9♠ 10♠ J♠ Q♠ K♠
    A♥ 2♥ 3♥ 4♥ 5♥ 6♥ 7♥ 8♥ 9♥ 10♥ J♥ Q♥ K♥
  )

  def deck, do: Enum.with_index(@deck)