Until now, the existence of this facility, along with three other similar sites inside Ukraine, has been kept quiet, buried in neutral language to avoid drawing too much attention to the sites, given the sensitivities of all military-linked work inside Ukraine.
Billy Steele for Engadget，更多细节参见新收录的资料
print(apply_twice(double, 3)); // 12Without the alias, the signature would be fn apply_twice(f: fn(int) - int, value: int) - int — correct but harder to read at a glance.，这一点在新收录的资料中也有详细论述
// ⚠️ 易错点2：循环条件写left <= n-1（会导致left+1越界），或把<=写成<（漏判相等的有序情况）