Hash function quality and speed tests. Contribute to rurban/smhasher development by creating an account on GitHub.
//以下代码摘录于stl_hash_map.h //以下的hash<>是个function object,定义于<stl_hash_fun.h>中 //例如:hash<int>::operator()(int x)const{return x;} template <class _Key, class _Tp, class _HashFcn, class _EqualKey, class _Alloc> class hash_map { // requirements: __STL_CLASS_REQUIR...
Migrate Git from SHA-1 to a stronger hash function. Background At its core, the Git version control system is a content addressable filesystem. It uses the SHA-1 hash function to name content. For example, files, directories, and revisions are referred to by hash values unlike in other ...
("post-transition") Treat object names input by the user as SHA-256 and write output using SHA-256. This is safer than mode 3 because there is less risk that input is incorrectly interpreted using the wrong hash function. The mode is specified in configuration. ...
NamePathTypeDescription Digest Digest string The hash value as an output string. Digest Encoding DigestEnc string The digest encoding. Type Type string The hash function used. Key Key string The input value.Post an array for MD4Operation ID: MD4-POST-File Create...
public ObjectcomputeIfPresent(Object key, BiFunction remappingFunction) 参数:此方法接受两个参数: key与值关联的:key。 remappingFunction:function对值进行运算。 返回值:此方法返回与指定键关联的新的重新映射的值;如果映射返回null,则返回null。 以下示例程序旨在说明computeIfPresent(Key,BiFunction)方法: ...
VcomputeIfPresent(Kkey,BiFunction<? superK,? superV,? extendsV> remappingFunction) If the value for the specified key is present and non-null, attempts to compute a new mapping given the key and its current mapped value. booleancontainsKey(Objectkey) ...
在四大核心函数式接口基础上,还提供了诸如BiFunction、BinaryOperation、toIntFunction等扩展的函数式接口,都是在这四种函数式接口上扩展而来的,不做赘述。 总结:函数式接口的提出是为了让我们更加方便的使用lambda表达式,不需要自己再手动创建一个函数式接口,直接拿来用就好了,贴 方法引用若lambda体中的内容有方法已经实...
maphash function table ,对表中键值对使用 function ,返回 nil。函数应接受 key 和 value 两个参数 copy-hash-table ,创建并返回一个表的副本,与原表共享键值对,也就是浅拷贝。 (gethash 'a #s(hash-table data (a 1))) => 1 (gethash 'b #s(hash-table data (a 1))) => nil (gethash '...
cycl./map: The result of the Hashmap test for /usr/dict/words with fast C++ hashmap get queries, with the standard deviation in brackets. This tests the inlinability of the hash function in practise (see size). The smaller the better. size: The object size in byte on AMD64. This af...