john-evangelist

defmodule App.Implementations do
  def of(key) do
    with impls when is_list(impls) <- Application.get_env(:app, :impls),
         {:ok, module} <- Keyword.fetch(impls, key) do
      module
    else
      :error ->
        raise KeyError,
          message: """
          :#{key} key is not defined in the implementations for application :app

john-evangelist

defmodule Project.ActiveUsers do
  @behaviour Project.UseCase

  def run(params, deps) do
    deps[:repo].fetch_users(params)
  end
end

john-evangelist

defmodule Event do
  @type t() :: %__MODULE__{date: Date.t(), title: String.t(), content: String.t()}

  defstruct :date, :title, :content


  def group(events) do
    events
    |> Enum.group_by(fn event -> envent.date)
    |> Map.to_list()

john-evangelist

Pure vs impure and why should I care?

Some of the most important advancements in programming came from adding restrictions to the way we program. Famous article by Edsger Dijkstra Go To Statement Considered Harmful shows how introducing one statement into programming language breaks many nice properties of that language. goto gives us freedom and solves couple of simple problems like breaking from nested loops easily, but it can make programs very hard to understand. This happens, because we cannot look at two pieces of code in separation. The execution can jump to some other place in code or even worse: it can jump from other piece of code to here and We need to keep that in mind.

john-evangelist

Service: Blog

<< Description >>

Thrid Party Dependencies

Thrid party depedencies used by this service:

| Service | Protocol | Documentation | Env Vars |

john-evangelist

const path = require('path');
const glob = require('glob');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const paths = {
    static: path.join(__dirname, "../priv/static"),
    build: path.join(__dirname, "../priv/static"),
    node_modules: path.join(__dirname, "./node_modules"),

john-evangelist

• Create file on .templates folder at user home: mkdir ~/.templates/elixir && touch ~/.templates/elixir/module
• Contents:

defmodule {{mod}} do
end

Usage: bob -tpl elixir/module -d ./person.ex -v mod=Person

Templates are based on handlebars rendered by aymerick/raymond

john-evangelist

const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const devMode = process.env.NODE_ENV !== 'production'

module.exports = {
    entry: './src/main/resources/assets/js/index.js',
    output: {
        filename: './js/index.js',
        path: __dirname + '/src/main/resources/static/'
    },
    module: {

john-evangelist

warn  Unable to automatically connect to build server.
info  running 'sbt metalsEnable bloopInstall'
error Getting org.scala-sbt sbt 1.2.1  (this may take some time)...
info  downloading https://repo1.maven.org/maven2/org/scala-sbt/sbt/1.2.1/sbt-1.2.1.jar ...
info  [SUCCESSFUL ] org.scala-sbt#sbt;1.2.1!sbt.jar (1216ms)
info  downloading https://repo1.maven.org/maven2/org/scala-sbt/main_2.12/1.2.1/main_2.12-1.2.1.jar ...
info  [SUCCESSFUL ] org.scala-sbt#main_2.12;1.2.1!main_2.12.jar (6509ms)
info  downloading https://repo1.maven.org/maven2/org/scala-sbt/logic_2.12/1.2.1/logic_2.12-1.2.1.jar ...
info  [SUCCESSFUL ] org.scala-sbt#logic_2.12;1.2.1!logic_2.12.jar (883ms)
info  downloading https://repo1.maven.org/maven2/org/scala-sbt/actions_2.12/1.2.1/actions_2.12-1.2.1.jar ...

john-evangelist

import akka.actor.ActorRef;
import akka.dispatch.*;
import org.jctools.queues.MpscArrayQueue;

/**
 * Non-blocking, multiple producer, single consumer high performance bounded message queue,
 * this implementation is similar but simpler than LMAX disruptor.
 */
public final class MpscBoundedMailbox implements MessageQueue {