Resources to learn more about strings, encoding, Unicode…
- Mastering Ruby - Strings and Encodings - Book by Aaron Lasseigne
- Guide to string encoding in Ruby - Article by Aaron Patterson
- Pragmatic Unicode, or How do I stop the pain - Talk by Ned Batchelder at PyCon 2012 (from 2010, still great!)
- The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!) - Article by Joel Spolsky (from 2003, still great!)
- The Absolute Minimum Every Software Developer Must Know About Unicode in 2023 (Still No Excuses!) - Article by Nikita Prokopov