ASCII to Unicode, what can possibly go w̵̳̓r̸̡̽ǒ̴̝n̴̬ͣg̶ͤ͜?
summary
Explains how Unicode maps abstract code points into bytes via UTF‑8/16/32, claims Unicode reserves 1.1 million code points and notes Java 20 tracks Unicode 15.0 (15.1 released Sept); shows explicit mismatch of encoder/decoder and byte‑order issues (BOM) yields garbage or nulls. Demonstrates Java pitfalls: String.length returns UTF‑16 code units so emojis split into surrogates, naive substring or reverse produces question marks; using StringBuilder.reverse or code‑point APIs preserves graphemes. Recommends always declare and match the encoding.
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chapters (17)
- 0:00Introduction to text encoding
- 1:27ASCII limitations and teleprinters
- 3:17Extending ASCII to support languages
- 6:32Unicode and its purpose
- 8:41Unicode code points and planes
- 11:40Unicode Transformation Formats
- 15:55UTF-8 vs UTF-16 vs UTF-32
- 18:29Explicit encoding matters
- 19:34String length and surrogates
- 22:49Reversing strings with emojis
- 25:20Encoding mismatches and garbage
- 27:51Normalizing Unicode characters
- 30:38Ligatures and compatibility
- 32:23Zalgo text and diacritics
- 33:28Emoji composition and skin tones
- 36:41Key takeaways and encoding agreement
- 37:22Q&A session
