Ruby Meditation #22 in Dnipro

Meditation will be held on May 19, at Parle, Troitska St, 21 g, Dnipro
27 April 2018   2986

On Ruby Meditation #22 you will hear about helpful tools and gems for building Slack apps, examples how to build functional architecture with ruby, which place takes Ruby on Rails among alternatives in 2018 and much more.

Come and get your portion of good mood, knowledge, professional communication and tasty lunch :)

Share your positive experience and best practices on this Ruby Meditation #22. If you have any work issues you cannot solve, our community will gladly help you to find the best way out in live discussion at Lightning talks session. You may also try yourself as a speaker with a short 5-10 mins talk. Fill in this form.


Anna Shcherbinina

Topic: "Docker + GPU. Not about mining."

Anna Shcherbinina
Anna Shcherbinina

Just before Christmas we launched a new body-measurement feature for our project. A person goes into the 3D booth, gets scanned, and the body-measurements are calculated with the 3D scan data. We couldn't avoid using a GPU with these calculations.

How to install this branch of processing into our elegant scaling pipeline? When you're dealing with 3D scans you should remember two things: it's expensive and time-consuming. By the way, its workload fluctuates throughout the days. The easiest solution for us was to use Docker.

This speech is not about mining, but the most helpful articles for us were ones such as "Building your own mining farm". That's because we use quite a similar infrastructure.

GPU, Docker, scaling. What we achieved, where we failed, and what it became of it in the end is all included in my speech.

Anna Shcherbinina

Head of Web, Artec3D, Luxembourg

Kirill Shevchenko

Topic: "Building Slack apps with Ruby."

Kirill Shevchenko
Kirill Shevchenko

Overview of Slack APIs. Their features, restrictions, and bottlenecks. Which API is right for you? Helpful tools and gems for building Slack apps.

Kirill Shevchenko

Ruby/JS Developer

Valentine Ostakh

Topic: "Functional objects in Ruby: new horizons "

Valentine Ostakh
Valentine Ostakh

Overview of functional programming concepts.  What is functional objects. Examples how to build functional architecture with ruby.

Valentine Ostakh

Ruby/JS Developer

Leonid Shevtsov

Topic: "A polyglot's view of Ruby on Rails"

Leonid Shevtsov
Leonid Shevtsov

Nowadays, it's hip to switch from Rails to other languages and frameworks. Leonid, too, has abandoned Rails, played the field a bit, and has come around to occasionally but consistently picking Rails for some projects. What's the modern reason to use Rails? What are the strengths of Ruby and Rails and how to build upon them? When you should really jump to some other platform? Let's answer these questions in a true Ruby meditation.

Leonid Shevtsov

Systems Architect

Oleksii Dashkevych

Topic: "Project development - preparing hell dish together"

Oleksii Dashkevych
Oleksii Dashkevych

The recipe is averaged, because of many variations. We take some Ruby code and add Rails magic, Postgresql on top. Add Docker for viscosity. Then put this on AWS EBS pan and start frying. It's all roasted until burning deadlines and generously watered with bugs, serves to the customer. They start eating. Eat and whisper: “This is an awesome product!”. At the same time, he forehead is sweating. Kindly offer to fix bugs, but we refuse and put them in JIRA. Do I need to talk about what kind of feedback comes then? Tasks with such recipes, that double estimated.

Oleksii Dashkevych

Ruby/JS Developer

Thanks to the sponsors: Ruby Garage, Railsware, Aejis.

Students, who interested in ruby and have a willingness to visit Ruby Meditation, will get a discount 50% with promocode ‘student’. Please send your student ID’s scan to make your registration on the event faster.

If you are a parent of a small baby (0-3 years) on maternity leave and you want to learn more about ruby development you can get a special discount for a ticket with promo code ‘GrowWithYourKid’. Please send your document's scan or take it with you to approve your status and make your registration in the event faster.

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Ruby/RoR News Digest 11 - 17.01

A migration path to Bundler 2+, the updated Ruby bibliography, testing signed and encrypted cookies in rails and more
17 January 2020   65

Greetings! I hope your week went great! Here's new Ruby news digest.

Learn the 3 ways webpack surprises coders, about the the pros and cons of using structure.sql in your Rails app, developers feedback on contributing to Ruby MRI and many other interesting things.


  • A Migration Path to Bundler 2+

The migration path the Bundler team could use for moving to Bundler 2+

  • 3 ways Webpack surprises web developers

Check what skilled learned helping with Webpack questions on StackOverflow for a month and why it may be really surprising even for the experienced programmer

  • The Ruby Bibliography

Great and recently updated list of must-read Ruby books

  • The Pros and Cons of Using structure.sql in Your Rails App 

Learn about the great differences and benefits of using structure.sql against the default schema.rb schema formats in your RoR apps

  • Contributing to Ruby MRI

Developer's feedback on contributing to the big Ruby "thing"


  • Effectively Using Materialized Views in Ruby on Rails

Learn what gives the materialized views in Postgres and how to use them in Rails

  • Testing Signed and Encrypted Cookies in Rails

Somethings, even such tasks come across the devs, so it's time to learn how to do that by checking author's experience


  • Rufo

An opinionated ruby formatter, intended to be used via the command line as a text-editor plugin

  • Solidus

Free and open-sourced ecommerce platform, built on the Rails


  • 165: Rubyfmt with Penelope Phippen

The talk of 4 hosts (Coraline Ada Ehmke (speaker, writer, teacher, open source advocate and technologist with 20 years of experience), Jamey Hampton (an artist who turned into a programmer), Rein Henrichs(software developer) and Mandy Moore (show manager and producer of Greater Than Code)) with a Ruby developer and director of Ruby Central, ex-maintainer of RSpec about the popular code formating tool