ruby (8 posts)

tl;dr ruby allow(Thread).to receive(:new).and_yield What's the problem? In Ruby, Thread can be used for asynchronous processings that would take a while. However, the asynchronousity sometimes cause unexpected results in unit tests, like Rspec. Say, a class that uses Thread inte

Rspec is one of the most popular test framework in Ruby, and of course it offers lots of functionalities for being able to write various type of test cases, like mock, stub, matcher, etc. allow_any_instance_of is a powerful method, which is able to stub any instance of a class even though using i

YugabyteDB is "The Leading High-Performance Distributed SQL Database". https://www.yugabyte.com/ It has been developed as an open source and called [Distributed SQL](https://blog.yugabyte.com/what-is-distributed-sql/). YugabyteDB is a Distributed SQL product, like Google Cloud Spanner which is

As a software engineer's habit, I've implemented a toy programming language in Ruby for my learning. GitHub repository is [petitviolet/9cc-ruby](https://github.com/petitviolet/9cc-ruby.git). What it looks like Almost *basic* syntax is supported, and only int type is available. - use number

Ruby2.7 provides Pattern Matching feature as an experimental one. https://www.ruby-lang.org/en/news/2019/12/25/ruby-2-7-0-released/ I used to do pattern matching in Scala, so I'm excited to be able to use it in Ruby! tl;dr [Rstructural Gem](https://github.com/petitviolet/rstructural) what I'

I've developed a circuit breaker in Ruby, and published it as rcb gem in RubyGems.org. - GitHub: [petitviolet/rcb](https://github.com/petitviolet/rcb) - RubyGems: [rcb](https://rubygems.org/gems/rcb) What is CircuitBreaker? CircuitBreaker is a well-known pattern to make services stable that

Qiita began to provide a feature to show what types of articles I write and put +1. At that time, they made when I read public without opt-in. [ユーザーページをリニューアルしました - Qiita Blog](https://blog.qiita.com/user-page-renewal/) I'd like not to make my browsing histories public, so I was going to delete my

ruby の[guard/guard](https://github.com/guard/guard)を使ってファイルの変更を監視して、 裏で自動コンパイルする 準備 まずguardをインストールする 以下の様な Gemfile を用意する Gemfile source 'http://rubygems.org' gem 'guard' gem 'guard-shell' gem 'rb-readline' gem 'rb-inotify' そして sh gem install bundle bundle install でguard