but there’s a problem with the classical formulation. the derivative takes a regex and a character, so to build a state machine you need to compute it for every possible character to get all transitions from a given state. sure, you can compress the number of characters into equivalence classes before, but you still have to compute for each equivalence class - and many of them end up leading to the same state anyway. for example, the regex abc (below) cares about a, b, c, and “everything else”, which brings us down from 65536 to 4 in UTF-16, but for the first node (abc) even b and c behave the same as “everything else”. so what are we computing these for? in other words, there is something left to improve here.
因此，有必要将性教育作为独立课程纳入中小学课程体系。，更多细节参见新收录的资料
println(primes.contains(4)); // false，更多细节参见PDF资料
经过我的简单测试，你可以在 Windows Phone 上玩到这些耳熟能详的古早味作品：
sorted[j + 1] = temp;