see also => ...
- Ruby version
- ruby 2.5.0p0 (2017-12-25 revision 61468) [x86_64-darwin17]
- ruby 2.6.0p0 (2018-12-25 revision 66547) [x86_64-darwin18]
- System dependencies
- minitest
- Quotation
these code are sample of "プロを目指す人のためのRuby入門"
see also => ...
these code are sample of "プロを目指す人のためのRuby入門"