After building my first API in Phoenixframework which serves CouchDb data to an iOS app. I found my self missing FactoryGirl. I found factory_girl_elixir, which I tried to use for persisting my couch data for testing, but didn’t like the API. So I decided to try my own implementation, for practical and didactic purposes.

Now it does simple factories that persist. But plan to add more features soon.

https://github.com/javierg/couch_factory

When I started with Elixir and Phoenix I wanted to see with my own eyes the speed of functional approach and Erlang in comparing with other well known languages. I just want to compare the simplest possible „Hello world“ in Javascript, PHP and Elixir.

So well, the fully featured fat-lady framework Phoenix with its rounting, view, layout and template runs at the same speed like a pure NodeJS with http. And PHP plain just returning a string is not significant faster.

http://blog.rh-flow.de/2015/10/08/benchmark-helloworld-in-different-frameworks-myelixirstatus/

This is my second part of my experiments with Elixir TCP server programming. I am still learning this. The good news is that my msg server improved 4x over the previous one:

http://dbeck.github.io/Four-Times-Speedup-By-Throttling/

The previous one did only 22k messages / sec:

http://dbeck.github.io/simple-TCP-message-performance-in-Elixir/

Beware! I am still an Elixir beginner, don’t copy codes into production from these posts. Thank you all the nice feedbacks!

https://youtu.be/od5FxqxjIzM

Dynamic nested forms

Inspiration: http://blog.plataformatec.com.br/2015/08/working-with-ecto-associations-and-embeds/ Source: https://github.com/cas27/nested

Hey everyone! We’ve been working on a factory library called ExMachina: https://github.com/thoughtbot/ex_machina

We’ve been using it on a few internal projects. Here’s what we think you’ll like.

• Makes it easy to work with belongs_to associations
• Easy to pipe records through functions
• Simple API with as few macros as possible

You can do cool things like

factory :user do
  %User{
    name: "Johnny",
    email: sequence(:email, &"email-#{&1}@example.com")
  }
end

def make_admin(user) do
  %{user | admin: true}
end

def with_article(user) do
  create(:article, user: user)
  user
end

build(:user) |> make_admin |> create |> with_article

Going over the basics of a has_many / belongs_to association and their nested form using phoenix.

https://youtu.be/x_Zv_BT1gKI

I just created the second part of my blog tutorial in Phoenix, this time covering authorization, associations, and more testing!

https://medium.com/@diamondgfx/writing-a-blog-engine-in-phoenix-part-2-authorization-814c06fa7c0

Overview of the elixir logger used by Phoenix, filtering parameters in your log and how to go about writing your own logging backend.

https://youtu.be/p7tCvygCebE

Learn how to debug a phoenix app, in-line inspection and configuring your IEx session to make things faster.

https://youtu.be/EBbSM6DSZnA

I sent messages in a loop to an Elixir TCP server which sent back an ACK in turn. I was interested to see how many roundtrips would go per second. This is a non-scientific experiment to get an idea about the performance of this scenario.

http://dbeck.github.io/simple-TCP-message-performance-in-Elixir/

My weekend project, and I love it: https://github.com/bigmachine-io/blackbook.

Handles the basics of a membership system (no UI, just data etc).

https://tkowal.wordpress.com/2015/10/04/building-docker-images-for-elixir-applications/

Join me as I take an exploratory look into the subject using protocols in place of Haskell’s type classes.

http://www.slogsdon.com/functors-applicatives-and-monads-in-elixir/

In the wake of ElixirConf 2015 and Jose Valim’s keynote address outlining the future of the language, many are left to wonder if Valim is the most dangerous language designer alive today. How many features can one man deprecate before he is stopped?

RIP HashSet, HashDict, Set, and Dict. You will be missed. By some.

We have a special report.

I made a nice API client for Instagram called Elixtagram

Also includes a Phoenix user authentication example :)

I’ve been looking for a Stripe Library over the past week and each one I looked at fell short in some regard. Most were “very alpha”, some had no tests, others isn’t even build. I first went the route of trying to fork/help but soon found myself reworking the API (instead of just mirroring a REST client) and so I decided to just go my own direction.

The repo is here and the package itself is here.

This is my first Elixir package so there might be some rough spots… in fact I’m sure of it!

The API is essentially what you would expect:

Stripe.Customers.create_subscription("customer_id","test-plan", [options])

This week, Jason Harrelson and I started a new Elixir-based screencast service. We produce bite-sized, introductory screencasts as well as longer, more involved series aimed toward intermediate and advanced Elixir developers. All screencasts are currently free (as of 10/2/15).

https://excasts.com

Power Assert provides descriptive assertion messages like the following.

  1) test Enum.at should return the element at the given index (PowerAssertTest)

     array |> Enum.at(index) == two
     |             |  |         |
     |             |  |         2
     |             |  2
     |             3
     [1, 2, 3]

It’s easy to use your project. You only replace ExUnit.Case into PowerAssert. This commit shows how to use PowerAssert.

Enjoy!

https://github.com/ma2gedev/power_assert_ex

This is an early morning experiment with Erlang and Elixir integration:

http://dbeck.github.io/Using-Ranch-From-Elixir/

Tried my hand at making a screencast. Will work on better format next time!

https://www.youtube.com/watch?t=392&v=_7NNJLhAQ1k