compile("hello world") == "HELLO WORLD"
Rather than fully removing the key from the map, we set the register value to null. The metadata is kept around so we can disambiguate deletions from states that simply don’t have a key yet. These are called tombstones — the ghosts of CRDTs past.
，这一点在下载安装 谷歌浏览器 开启极速安全的 上网之旅。中也有详细论述
«Я купил в строительном магазине баллончик с краской и написал ему на воротах перед отъездом слово fraud (мошенничество — прим. «Ленты.ру»)», — признался дизайнер.
then the += will modify the list, and then raise an exception because you can’t assign to that tuple item because the tuple is immutable, but the list will have been mutated.
; RETF (protected mode) — execution flows DOWN this listing