stevedomin

defmodule MyBlog.Repo.Migrations.CreatePost do
  use Ecto.Migration

  def change do
    create table(:posts, primary_key: false) do
      add :id, :uuid, primary_key: true
      add :body, :string
      add :word_count, :integer

      timestamps

stevedomin

package main

import "fmt"
import "regexp"

func main() {

	str := "a\nb"
	fmt.Println(str)
	

stevedomin

defmodule SimpleDynamoDeploy.Mixfile do
  use Mix.Project

  def project do
    [ app: :simple_dynamo_deploy,
      version: "0.0.1",
      build_per_environment: true,
      dynamos: [SimpleDynamoDeploy.Dynamo],
      compilers: [:elixir, :dynamo, :app],
      deps: deps ]

stevedomin

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns                     on recent CPU
L2 cache reference ........................... 7 ns                     14x L1 cache
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns                     20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs 4X memory

stevedomin

import Swoosh.Email

upload_invoice = %Plug.Upload{
  path: "/tmp/plug/DEFfF014AaA01F",
  content_type: "",
  filename: "invoice-peter-may.pdf"
}

new()
|> to("peter@example.com")

stevedomin

import Swoosh.Email

new()
|> to("peter@example.com")
|> from({"Jarvis", "jarvis@example.com"})
|> subject("Invoice May")
|> text_body("Here is the invoice for your superhero services in May.")
|> attachment("/Users/jarvis/invoice-peter-may.pdf")

stevedomin

<%= form_for @changeset, @action, fn f -> %>
  <div>
    <%= label f, :name %>
    <%= text_input f, :name %>
  </div>

  <div>
    <%= submit "Submit" %>
  </div>
<% end %>

stevedomin

#
# pre ecto 2.0
#

# web/models/user.ex
defmodule User do
  schema "users" do
    field :name
    field :email
  end

stevedomin

defmodule MyBank.Client do
  defstruct client_id: nil, access_token: nil
  
  def request(client, method, path, params \\ %{}, body \\ nil, headers \\ []) do
    # prepare url, headers, etc.
    case HTTPoison.request(method, url, body, headers) do
      {:ok, %HTTPoison.Response{status_code: 200, body: body}} -> {:ok, body}
      # handle other cases ...
    end
  end

stevedomin

description "ex_playground"

setuid ex_playground
setgid ex_playground

start on runlevel [2345]
stop on shutdown

respawn
respawn limit 10 20