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Ruby & Rails Ruby
Ruby Native Extensions (Foreign Languages)
https://docs.ruby-lang.org/en/master/extension_rdoc.html
https://ruby-doc.org/docs/ruby-doc-bundle/ProgrammingRuby/book/ext_ruby.html
https://guides.rubygems.org/gems-with-extensions/
https://blog.appsignal.com/2018/10/30/ruby-magic-building-a-ruby-c-extension-from-scratch.html
https://github.com/ffi/ffi/wiki
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