Hi, emogex is an esoteric regular expression language based entirely on emojis. It was originally created as a joke at the @happyautomata twitter bot under this thread.
I've ended up actually using it regularly because i solve those FSMs to regexes on my phone, and it's more convenient to use emoji-based syntax because it's on the same keyboard as the language characters.
I've also noticed that other people (well, it's just this one guy so far at least two people) are now using emogex unironically to solve them, so i thought it's about time to write it all in a single document so you can more conveniently reference all the features of the language with