It's a common extension but it's not standard. Both C23 and C++23 only allow identifiers to start with a Unicode XID_START character, which excludes $. And with older standards, it was just Latin letters, the underscore, and explicit \u escapes.
If you look in the project's pedantic.cmake, you'll find a add_c_and_cxx_compile_options("-Wno-dollar-in-identifier-extension") just to suppress warnings about this.
My impression (again, open to correction) was that, although that's true, there are many places where breaking is not preferable, like how you can hyphenate in English but should prefer not to. Many in Japanese, basically needing a dictionary, and fewer in Chinese but still some.
Meanwhile, another trend among Chinese teenagers is the use of Pinyin initials to replace Chinese words. For example, 永远的神 (pinyin: Yǒngyuǎn de shén), a meme used to praise something, is often written as "yyds."
These teens have become accustomed to reading and writing sentences composed of such acronyms, and they even use them in real-life conversations—much to the annoyance of cultural conservatives. This phenomenon highlights how online communication can influence offline speech patterns.
You may self-host a vaultwarden to serve TOTP and install a website extension. To login you just click the extension for code and no need for any mobile app.
Unless the title is internationalised somehow (possible, but I doubt it), it's "4.76" in the original article. That's what happens when submitters editorialise ;-)
Yes, in India we use 3 places for the first and then 2 places for the rest. But comma was never a thing.
Fun fact: In India we use upto Crore as mentioned in the link, but recently had to learn upto Lakh Crore as the politicians looted bigger recently and went beyond normal. :)
You can run the demo locally following the Usage part. Currently the WASM shaper feature is not enabled in any browser, so the demo won't work in web pages.
But TIL dollar sign $ is also valid character for identifiers.