哈希函数(Hash Function)是指能将任意大小的输入(Key)映射到固定大小的哈希值(Hash Value)的函数。Key可以是固定长度如int类型,也可以是任意字符串,甚至可以是经纬度或者高维的向量。 在密码学中,哈希函数的输入key也叫message,pre-image,输出hash value也叫消息摘要,哈希函数记作h=H(m)。 和哈希函数密切相关的...
-bash-2.05b$ cat my.cpp#include <hash_map>#include <string>#include <iostream>using namespace std;//define the classclass ClassA{ public: ClassA(int a):c_a(a){} int getvalue()const { return c_a;} void setvalue(int a){c_a;} private: int c_a;};//1 define the hash funct...
Hash hash_function() const; Remarks The member function returns the stored hash function object. Example 复制 // std_tr1__unordered_map__unordered_map_hash_function.cpp // compile with: /EHsc #include <unordered_map> #include <iostream> typedef std::unordered_map<char, int> Mymap; int...
The previous code function demonstrates a very simple hashing algorithm. The function sums the characters in the string, shifting the hash value left one bit before each character is added in. Using this algorithm, the string "arr\units.dat" would hash to 0x5A858026, and "unit\neutral\acritt...
这回的两个库没怎么用过,这里的记录就用VC++写了,使用G++和BOOST的时候和智能指针类似。 首先是Tuple库 要注意的是这里G++,VC++和BOOST库的函数不太一样,所以使用的时候要注意没有使用到编译器和编译器相关的函数(特别是IDE的弹窗的方法要注意)。 比如VC++和G++里的tuple对象没有get方法,而boost里有,所以获取...
Hash function quality and speed tests. Contribute to rurban/smhasher development by creating an account on GitHub.
hash function object (class template) 代码语言:txt 复制 © cppreference.com 在CreativeCommonsAttribution下授权-ShareAlike未移植许可v3.0。 http://en.cppreference.com/w/cpp/string/basic[医]字符串/散列 本文档系腾讯云开发者社区成员共同维护,如有问题请联系cloudcommunity@tencent.com ...
*/ enum rte_hash_sig_compare_function sig_cmp_fn; /**< Indicates which signature compare function to use. */ uint32_t bucket_bitmask; /**< Bitmask for getting bucket index from hash signature. */ uint32_t key_entry_size; /**< Size of each key entry. */ void *key_store; /**...
// cliext_hash_map_clear.cpp // compile with: /clr #include <cliext/hash_map> typedef cliext::hash_map<wchar_t, int> Myhash_map; int main() { Myhash_map c1; c1.insert(Myhash_map::make_value(L'a', 1)); c1.insert(Myhash_map::make_value(L'b', 2)); c1.insert(Myhash...
main.cpp lists some secrets for each hash function we test against. The function <hash>_bad_seeds() lists the confirmed bad seeds. Special care needs to be taken for crc, most FNV1 variants, fletcher, Jenkins. And with GOOD hashes most MUM variants, like mirhash, MUM, wyhash. ...