2015-06-24開催の実践リーダブルコードで実装する課題の概要と進め方の説明。

2015-06-24開催の実践リーダブルコードの概要と進め方の説明。

2015-06-24開催の実践リーダブルコードでのふりかえりの進め方の説明。

リーダブルコードワークショップ（パイオニア向け）でのコードチェンジの進め方の説明。

リーダブルコードワークショップ（パイオニア向け）でのリーダブルコードの共有の進め方の説明。

リーダブルコードワークショップ（パイオニア向け）のまとめと次のステップの説明。

リーダブルコードワークショップ（パイオニア向け）でのアイスブレイクの仕方の説明。

リーダブルコードワークショップ（パイオニア向け）で実装する課題の概要と進め方の説明。

リーダブルコードワークショップ（パイオニア向け）の概要と進め方の説明。

リーダブルコードワークショップ（パイオニア向け）でのリーダブルコードの共有の進め方の説明。

Apache Arrowの2018年11月現在の最新情報を紹介します。特に、Ruby関連の部分を紹介します。

Is there a gem author around you? Did you meet any author of the gems used? Did you contact with any author of the gems used on the Internet? Do you think that "the author is cool!", "the author is awesome!" or "I respect the author!"? Do you want to be a gem author? This talk doesn't describe about how to create a gem because it is easy. "gem" is a package of Ruby library (, tool and so on) for easy to install. This talk describes about developing a library that is gem content. This talk is based on my experience as a library developer. This talk describes about how to write codes, how to write documents, release, support and mental set for a better "library developer". I hope that this talk is a trigger for increasing the number of better "library developers".

This talk describes three Ruby usages: * Implementing high-level interface by Ruby. * Using Ruby as a glue language. * Embedding Ruby into a C program for flexibility. All of them have pros and cons. They are trade-off. If a case can ignore cons, we will have pros for the case. Most of Rubyists implement their Ruby applications only by Ruby. This talk shows another options to use Ruby as your convenient tool. If you know another options and trade-offs of them, you will implement your Ruby applications more effectively. This talk uses Droonga, a distributed full-text search engine, as a sample application to describe these Ruby usages. Droonga uses these three Ruby usages.

This talk describes about the history of testing framework in Ruby. Ruby 2.2 bundles two testing frameworks. They are minitest and test-unit. Do you know why two testing frameworks are bundled? Do you know that test-unit was bundled and then removed from Ruby distribution? If you can't answer these questions and you're interested in testing framework, this talk will help you. This talk describes about the history of bundled testing framework in Ruby and some major testing frameworks for Ruby in chronological order.

This talk describes how to create Ruby bindings of a C library. It's the latest information in 2016.

Ruby's extension API is for C. This talk proposes C++ as a better language for extension API.

Here are my activities as a Rubyist: * Increase what Ruby can do with free software * Maintain libraries In this talk, I introduce my activities.

csv, one of the standard libraries, in Ruby 2.6 has many improvements: * Default gemified * Faster CSV parsing * Faster CSV writing * Clean new CSV parser implementation for further improvements * Reconstructed test suites for further improvements * Benchmark suites for further performance improvements These improvements are done without breaking backward compatibility. This talk describes details of these improvements by a new csv maintainer.

I introduced Ruby and Apache Arrow integration including the "super fast large data interchange and processing" Apache Arrow feature at RubyKaigi Takeout 2021. This talk introduces how we can use the "super fast large data interchange and processing" Apache Arrow feature in Ruby. Here are some use cases: * Fast data retrieval (fast (({pluck}))) from DB such as MySQL and PostgreSQL for batch processes in a Ruby on Rails application * Fast data interchange with JavaScript for dynamic visualization in a Ruby on Rails application * Fast OLAP with in-process DB such as DuckDB and Apache Arrow DataFusion in a Ruby on Rails application or irb session

ADBC is Apache Arrow Database Connectivity. It provides a API that can connect to different databases by wrapping database specific APIs. This is not a new approach. There are existing APIs such as Active Record, Sequel and ODBC. The difference between the existing APIs and ADBC is the focus on large data and performance. ADBC is an important part to use Ruby for data processing. We can extract large data from many databases (not only RDBMSs but also data ware houses and so on) and load large data into many databases with ADBC. To use Ruby for data processing, we need data. ADBC helps it.