Practical Testing Tips / Introducing Scratch to Rubyists

Wed, 25 Jul 2018 19:00 - 21:30 JST


東京都渋谷区渋谷二丁目12番19号 東建インターナショナルビル5階


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Drinks and a light meal will be provided



19:00 〜 19:30 Doors open

Grab a drink and catch up with your fellow Rubyists.

19:30 〜 19:55 Practical Testing Tips Kazuho Yamaguchi

There are many methodologies that are believed to improve software development: TDD, Test first, refactoring, code coverage, code reviews, CI, and so on. It's hard to follow all those methodologies as the project and team gets bigger. I will show you simple and practical tips to make your tests more valuable.


Kazuho is a freelance Ruby on Rails developer who has frequently worked as part of international development teams. His interests include testing and data analytics, and as he's dived deeper into it he's picked up a bit of R and Python. His hobbies include music and horse riding.

20:00 〜 20:25 Introducing Scratch and ScratchX to Rubyists Junya Ishihara

Scratch is a visual programming language developed by the MIT Media Lab. Although it is designed especially for ages 8 to 16, it is used by people of all ages. Behind Scratch there is a philosophy, "low floors" and "high ceilings". It provides easy ways for beginners to get started (low floor) but also ways for them to work on increasingly sophisticated projects over time (high ceiling). I will introduce the "high ceilings" part of Scratch and ScratchX (extended version of Scratch) by connecting Ruby and Tensorflow.js to Scratch so that you can create a game or control a robot using Machine Learning.


Author of Scratchで楽しく学ぶ アート&サイエンス . Tsukurusha LLC, Machiquest Inc. CEO and Developer. Freelance Engineer specialized in Ruby on Rails and Objective C. Founder of CoderDojo Chofu, which helps young people aged 7 – 17 learn and enjoy programming.

20:30 〜 21:30 Open Networking

Discuss the presentations or anything else Ruby related with the other attendees.

Catering Sponsor

Sider is an automated code review service for GitHub. Get your pull requests checked by static program analysis tools. Ruby, Python, PHP, JavaScript, CSS, Java, Go and Swift support.

Venue Sponsor

PIXTA's engineers use Ruby on Rails to build their stock photo marketplace, and are looking for developers to join their team. You can learn more about what they're working on through their engineering blog.

About the Venue

From 19:00, the main entrance of the building is locked. Please use the back entrance (裏手 in Japanese, see this picture of it).

The back entrance will be locked from 8pm onwards, so please be sure to show up before then. If you don't make it on time, you can use our contact form, and we'll unlock it for you. Please note that we might take some time before we can respond.

About this community

Tokyo Rubyist Meetup

Tokyo Rubyist Meetup

Tokyo Rubyist Meetup (trbmeetup) is an event that seeks to help bridge the Japan and international ruby and ruby on rails community. It will hold regular meetings where Japanese Rubyists can commun...

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