In DS-SS CDMA multiple signal channels occupy the same frequency band being distinguished by the use of different spreading codes. Digital cellular telephone system and personal communication system uses CDMA c
Hive>create temporary function Lower as 'com.qianfeng.udf.Lower'; 1. 5、即可在hql中使用自定义的函数strip Select Lower(name),age from t_test; 1. 如果该函数确定不再使用时可以删除 Drop temporary function Lower; 1. 案例: 根据生日得到年龄,使用自定义函数实现。 4.3.3Transform实现 Hive的 TRANSFORM...
classHashableObjectimplements\Ds\Hashable { private$name; private$email; public function__construct($name,$email) { $this->name=$name; $this->email=$email; } /** * Should return the same value for all equal objects, but doesn't have to ...
Hashingis a technique used for storing and fast retrieval of a given value. This technique uses a hash function to convert any arbitrary value(hash) into a fixed-size value(index). As we know, in Java we have a native methodhashcode()which can be used to generate an arbitrary value. Th...
"OrderedHashSet" represents a set where the members are general expressions, membership is computed by using a hash function and the order in which members are inserted is preserved.
The Hash table data structure stores elements in key-value pairs where Key- unique integer that is used for indexing the values Value - data that are associated with keys. Key and Value in Hash table Hashing (Hash Function) In a hash table, a new index is processed using the keys. ...
See https://github.com/fordsfords/err for details.There are two sets of write/lookup APIs, one that allows an arbitrary byte array as the key, and the other assumes the key is a normal C string.FunctionsERR_F hmap_create(hmap_t **rtn_hmap, size_t table_size)...
@dsnet If [Hash is not consistent with reflect.DeepEqual], then reflect would not be a good home Agreed. The Hash function I have in mind (admittedly, thinking about experimental variations on sync.Map) would be consistent with == except for irreflexive values (e.g. NaNs), which implies...
bullet 是一款开源物理引擎,它提供了碰撞检測、重力模拟等功能,非常多3D游戏、3D设计软件(如3D Mark)使用它作为物理引擎。 作为物理引擎,对性能的要求是非常苛刻的;bullet项目之所以可以发展到今天,非常大程度取决于它在性能上优异的表现。 翻阅bullet的源代码就能看到非常多源代码级别的优化。本文将介绍的HashMap就是...
GetDelegateForFunctionPointer<RolFunc>(new IntPtr(funcAddr)); } else//失败则以委托的形式初始化 { AsmRol32Func = new RolFunc(RotateLeft32); } } } } 汇编代码很简单,x86 和 x64 的区别主要在于调用约定,具体详见 微软官方文档 ,此处不再赘述。这里内联汇编的方式是先把字符串所在页面设为可运行,...