mindreframer

In many production systems you'll want to have one module capable of talking to many potential implementations of a collaborator module (e.g a in memory cache, a redis-based cache etc). While testing it's useful to control which module the module under test is talking to.

Here are the approaches I can see. The two points that seem to divide the approaches are their tool-ability (dialyzer) and their ability to handle stateful implementations (which need a pid).

Passing modules

Modules are first class, so you can pass them in. Used in EEx, where passed module must implement a behaviour.

mindreframer

defmodule MyApp do
  use Application

  def start(_type, _args) do
    import Supervisor.Spec, warn: false

    children = [
      Plug.Adapters.Cowboy.child_spec(:http, MyApp.Router, [], [
        dispatch: dispatch
      ])

mindreframer

defmodule StageInspector do
  alias Experimental.{GenStage}
  use GenStage

  def init(type) when type in [:consumer, :producer_consumer] do
    {type, type}
  end

  def handle_events(events, _from, state = :consumer) do
    Enum.each events, &inspect_event/1

mindreframer

Currently, there is an explosion of tools that aim to manage secrets for automated, cloud native infrastructure management. Daniel Somerfield did some work classifying the various approaches, but (as far as I know) no one has made a recent effort to summarize the various tools.

This is an attempt to give a quick overview of what can be found out there. The list is alphabetical. There will be tools that are missing, and some of the facts might be wrong--I welcome your corrections. For the purpose, I can be reached via @maxvt on Twitter, or just leave me a comment here.

There is a companion feature matrix of various tools. Comments are welcome in the same manner.

mindreframer

defmodule Duration do
  @moduledoc """
  This duration module parses and formats strings
  for a time duration in hours and minutes and
  optionally seconds (e.g. 01:00 for an hour,
  00:01:10 for one minute and ten seconds).
  """
  @match ~r/^(?<hour>\d{1,2}):(?<min>\d{1,2}):?(?<sec>\d{0,2})$/

  def parse(string) do

mindreframer

require 'benchmark'
require 'json'

HASH = {'a'=>1, 'b'=>[1,2,3]}

class Roda
  class << self
    attr_accessor :opts
  end
end

mindreframer

#!/usr/bin/env ruby -wKU

require 'yaml'
class Generator
  def run
    300.times do |i|
      File.open(name(i), 'w') do |f|
        f.puts Article.new.content
      end
    end

mindreframer

# quick script to give files an index calculated from a table of contents file
class Renamer
  COMMON_STRING = 'Series Name by Author Name'
  def run
    actual.content.each do |file|
      clean_file = file.gsub(COMMON_STRING, '')
      to         = wished.wished_file_for_file(clean_file)
      cmd        = "mv '#{file}' #{to}"
      puts cmd
      `#{cmd}`

mindreframer

# lib/capistrano/tasks/slack.rake

# install slack-notifier gem
# include this file into your lib/capistrano/tasks/ folder
# add this line to the end of your Capfile: 
#    Dir.glob('lib/capistrano/tasks/*.rake').each { |r| import r }
# deploy with: 
#    MSG='fixing that payment bug...' cap staging deploy 

class SlackNotifierWrapper

mindreframer

http://ulozto.net/xnvgH92b/skype-6-6-0-106-by-salwoh-exe