Except that all implementations are subtly and annoyingly different, and while you can transfer your general understanding, you can’t avoid the cheatsheet if yo

Except that all implementations are subtly and annoyingly different, and while you can transfer your general understanding, you can’t avoid the cheatsheet if you’re using multiple tools. But of course, since this is basically a one-to-one mapping, you can also trivially transfer your understanding to any other regex tool anyways (with a cheatsheet, which you’ll need in either case).