首先,让我们去unorderedmap的源文件:On github 我们得知道这个东西的实现原理,里面我们可以看到这一句话,这个hashtable 显然调用了_Mod_range_Hashing和_Prime_rehash_policy从这里我们就可以大概知道这个东西的实现过程:首先hash这个数据,然后对这个hash值取模放入unordered_map。 对_Prime_rehash_policy的探索(hashtable...
2.1.3 Unordered Sampling without Replacement: CombinationsHere we have a set with nn elements, e.g., A={1,2,3,...n}A={1,2,3,...n} and we want to draw kk samples from the set such that ordering does not matter and repetition is not allowed. Thus, we basically want to choose...