joeljuca

defmodule Sorteio do
  @moduledoc false

  @people """
    Fernando Collor
    Fernando Henrique Cardoso
    Luiz da Silva
  """

  def people do

joeljuca

# lib./my_app/entries.ex
defmodule MyApp.Entries do
  alias MyApp.Entry

  # Aqui, eu espero erros serem retornados (como tuplas)
  # ao invés de serem lançados (com throw, etc.)
  def create_entry(attrs \\ %{}) do
    %Entry{}
    |> Entry.changeset(attrs)
    |> Repo.insert()

joeljuca

// ==UserScript==
// @name    MDN always in en-US
// @version 1
// @grant   none
// @match   https://developer.mozilla.org/*
// @run-at  document-start
// ==/UserScript==

(function () {
  const url = document && document.location && document.location.host;

joeljuca

defmodule ListOps do
  # Please don't use any external modules (especially List or Enum) in your
  # implementation. The point of this exercise is to create these basic
  # functions yourself. You may use basic Kernel functions (like `Kernel.+/2`
  # for adding numbers), but please do not use Kernel functions for Lists like
  # `++`, `--`, `hd`, `tl`, `in`, and `length`.

  @spec count(list) :: non_neg_integer
  # def count(l), do: count(0, l)
  # defp count(counter, []), do: counter

joeljuca

const FruitList = (() => {
  // Aqui, PRODUCT_LABELS passa a existir apenas dentro desse bloco,
  // o que na prática funciona igual a uma closure.
  const PRODUCT_LABELS = {
    456: { single: "Apple", plural: "Apples" },
    123: { single: "Banana", plural: "Bananas" },
    789: { single: "Oranges", plural: "Orangess" },
  };

  // O fato do nome interno ser o mesmo do nome externo é apenas para

joeljuca

defmodule TwitterClient do
  use Tesla

  @token System.get_env("TWITTER_TOKEN")

  plug(Tesla.Middleware.BaseUrl, "https://api.twitter.com")
  plug(Tesla.Middleware.DecodeJson)

  def get_tweets do
    {:ok, response} = make_request()

joeljuca

person = :joel

given_person = :john

case given_person do
  ^person -> "Hi, Joel!"
  person -> "Hi, #{person}!"
end
 # => "Hi, john!"

joeljuca

type DocumentVersion = {
  // CouchDB's own ID system
  _id: string;

  // Your document history ID - the same across all versions of a document
  historyId: string;

  // The _id of the ancestor document (undefined if first version)
  parentId: string;

joeljuca

const Option = ({ option, onChange }) => {
  return (
    <label for="">
      <option onChange={onChange} /> {option.title}
    </label>
  );
};

const Question = ({ question, onSubmit }) => {
  return (

joeljuca

// IIFE - Immediately Invoked Function Expression
(function () {
  "use strict"
  
  console.log("I'm inside a private scope!")
})()