Java documentation forjava.util.Hashtable.computeIfPresent(K, java.util.function.BiFunction<? super K, ? super V, ? extends V>). Portions of this page are modifications based on work created and shared by theAndroid Open Source Projectand used according to terms described in theCreative...
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 ...
ComputeIfAbsent(Object, IFunction) (Inherited from HashMap) ComputeIfPresent(Object, IBiFunction) (Inherited from HashMap) ContainsKey(Object) To be added (Inherited from AbstractMap) ContainsValue(Object) To be added (Inherited from AbstractMap) Dispose() (Inherited from Object) Dispose...
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: 范例1...
This is a minimized implementation of theprvhash64hash function. Arguably, it is the smallest hash function in the world, that produces 64-bit hashes of this quality level. While this function does not provide a throughput that can be considered "fast", due to its statistical properties it ...
(as applicable), it computes a hash value (using the same hash function) and looks in the hash table for matches. If a residual predicate is present (identified by RESIDUAL:() in theArgumentcolumn), that predicate must also be satisfied for rows to be considered a match. Behavior depends...
("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. ...
If the function returns null, the mapping is removed. If the function itself throws an (unchecked) exception, the exception is rethrown, and the current mapping is left unchanged. Specified by: computeIfPresent in interface Map<K,V> Parameters: key - key with which the specified value is to...
//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...
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...