Xah Talk Show 2026-07-03 Ep802. Write JavaScript app to convert letters to Unicode Circled Letters Ⓐ Ⓑ Ⓒ
Video Summary (Generated by AI, Edited by Human.)
In this coding session, Xah Lee demonstrates how to build a JavaScript application that converts standard text into various Unicode characters, specifically focusing on circled letters (Ⓐ Ⓑ Ⓒ).
Key Highlights and Topics:
- Unicode Conversions: The video showcases how to generate various text styles using Unicode, including:
- Upside down text (1:31)
- Math fonts (e.g., bold, italic, script) (3:01)
- Squared letters (4:12)
- Full-width characters (4:45)
- Braille (5:12)
- Technical Workflow: Xah uses Emacs as his primary development environment and explains his process for setting up the new circled letter converter by repurposing existing code from his squared letters project (38:01).
Programming and Design Philosophy: Throughout the session, he discusses several broader topics, including:
- Software engineering scams: A critique of industry practices like Agile and SEO (15:14, 21:26).
- Syntax design: A discussion on the pros and cons of "sugar syntax" in languages like TypeScript (1:13:38).
- Personal history: He touches on his early experience with the HP28 calculator and the RPL programming language (33:03, 57:25).
- Tools Mentioned: He demonstrates his custom Emacs commands, such as toggle-letter-case and insert-a-to-z (43:24, 46:04).
- The video concludes with a brief mention of "funky" Unicode characters, which he plans to explore in a future episode (1:14:50).
- write js code to convert letters to this
- Unicode: Circled Letters Ⓐ Ⓑ Ⓒ
- Unicode Upside-Down Text ɐ q ɔ
- Unicode: Math Font ℤ
- Unicode: Squared Letters 🄰 🅰 🅱 🅲 🆗
- Unicode: Full-Width Characters
- Unicode: Rune ᚠ ᚢ ᛋ ᛟ
- Unicode: Braille ⠮
- Software Engineering Social Scams. Index
- Translation SEO Scam (2011)
- Why Does Google Give SEO Advice (2010)
- Google Crimes. Index.
- Homoglyph spam (2012)
- Web Spam, Scam, SEO. Index
- IBM RPG III
- HP-28S Calculator (1988)
in TypeScript, you can cast types to prevent some type errors from DOM. For example, you get
unicode_circled_characters.ts(20,86): error TS2339: Property 'value' does not exist on type 'Element'.
so what you can do is add this:
<HTMLInputElement> (expr)
or
(expr) as HTMLInputElement
now you have syntax design issue. should you have sugar syntax in your programing language? and , if not, which should you choose?