member

1). ZADD key score member [[score member] ...] : 将一个或多个 member 元素及其 score 值加入到有序集 key 当中。 2). ZCARD key : 返回有序集 key 的元素个数。 3). ZINCRBY key increment member : 为有序集 key 的成员 member 的 score 值加上增量 increment 。 4). ZCOUNT key min max : 返回有序集 key 中， score 值在 min 和 max 之间(默认包括 score 值等于 min 或 max )的成员的数量。 5). ZRANGE key start end [WITHSCORES] : 返回有序集 key 中，指定区间内的成员。其中成员的位置按 score 值递增(从小到大)来排序。(按照排名取) 6). ZREVRANGE key start end [WITHSCORES] : 返回有序集 key 中，指定区间内的成员。其中成员的位置按 score 值递减(从大到小)来排列。(按照排名取) 7). ZRANGEBYSCORE key min max [WITHSCORES] [LIMIT offset count] : 返回所有 score 值介于 min 和 max 之间(包括等于 min 或

I'm dealing with an union in C++, and I would like have a function template which access to the active union member depending on a template parameter. Code is something like (doSomething is just an example): union Union { int16_t i16; int32_t i32; }; enum class ActiveMember { I16 , I32 } template <ActiveMember M> void doSomething(Union a, const Union b) { selectMemeber(a, M) = selectMember(b, M); // this would be exactly (not equivalent) the same // that a.X = b.X depending on T. } To accomplish this I only found bad hacks like specialization, or a not homogeneous way to access and assign. I'm

Say that I have a class that requires a few constants to function. Several member functions require use of these constants. Use of #define is frowned upon since it can cause collisions. The constants are hex patterns of 8 or 16 bits and are stored as uint8_t or uint16_t. These constants also don't change from instance to instance of the class, and therefore memory (albeit very little memory) can be saved by having only one copy of the constants. Is there anything improper, or perhaps of better way of accomplishing the above instead of simply doing something like the following: // mycode.h // .

1:作用域符号:: 前面一般是类名称，后面是该类成员，c++为避免不同类有名称相同的成员而采用作用域的方式进行区分 　　　如：A,B表示两个类，在A,B中都有成员member。那么 　　　　　A::member就表示类A中的成员member 　　　　　B::member就表示类B中的成员member 2:全局作用域符号：当全局变量在局部函数中与其中某个变量重名，用：：区分 3：::是C++里的“作用域分解运算符”。比如声明了一个类A，类A里声明了一个成员函数voidf()，但没有在类的声明里给出f的定义，那么在类外定义f时，就要写成voidA::f()，表示这个f()函数是类A的成员函数。

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qq_32768743/article/details/88852429 Line 18 : Char 26 : runtime error : member access within misaligned address 0xbebebebebebebebe for type 'struct MyListNode' , which requires 8 byte alignment ( solution . c ) 不知道LeetCode出了啥问题 我的提交代码 struct List { int count ; struct MyListNode * head ; struct MyListNode * tail ; } ; struct MyListNode { int val ; struct MyListNode * next ; } ; void add ( struct List * list , int val ) { struct MyListNode * node = ( struct MyListNode * ) malloc ( sizeof ( struct MyListNode * ) ) ; node -> val = val ; if ( list -

Continuing something learned in C++ error: base function is protected ... The C++11 pointer-to-member rules effectively strip the protected keyword of any value, because protected members can be accessed in unrelated classes without any evil/unsafe casts. To wit: class Encapsulator { protected: int i; public: Encapsulator(int v) : i(v) {} }; Encapsulator f(int x) { return x + 2; } #include <iostream> int main(void) { Encapsulator e = f(7); // forbidden: std::cout << e.i << std::endl; because i is protected // forbidden: int Encapsulator::*pi = &Encapsulator::i; because i is protected //

del是个语句而不是方法 del member[1]:通过下标进行删除 del member：也可删除整个列表 remove():根据列表元素本身来删除，而不是通过下标 member.remove('天天') pop(): member.pop():默认抛出列表最后一个元素， name = member.pop():且可将抛出的元素进行赋值。 member.pop(1):也可通过元素下标删除

报错：Call to a member function move() on a non-object 解决：加上接受参数 $file = request()->file('file'); 里边的file 必须写 文章来源: thinkphp Call to a member function move() on a non-object

redis: 一、针对key的操作 1.1 del key [key .. ] , 删除指定的一个或者多个key; 1.2 dump key , 序列化给定的key 1.3 restore key ttl serialized-value , 反序列化到key 1.4 exists key , 判断某一key是否存在 1.5 expire key seconds , 设置key的过期时间 ① set命令可以覆盖过期时间；不改变key的操作不会影响key的生存时间 ② rename也不会改变key的过期时间 ③ persist命令可以删除key的过期时间，即永久 ④ ttl可以查看redis中key的过期时间 1.6 expireat key timestamp , 设置key的生存时间 1.7 keys pattern , 查找所有符合给定模式pattern的key ① *, ?, [m,n] 1.8 move key db , 将当前数据库中的key移动数据库 db中。使用select db可以切换数据库 1.9 persist key , 移除给定 key 的生存时间 1.10 pexpire,pexpireat , 设置key的过期、生存时间，单位毫秒 1.11 ttl,pttl , key的剩余过期时间，单位秒，单位是毫秒 1.12 randomkey ,

It works just fine, for plain vanilla functions. The code below works just fine. It prints just what is should: int __cdecl(int, char) 2 int,char #include <boost/type_traits.hpp> #include <boost/function.hpp> #include <boost/typeof/std/utility.hpp> #include <iostream> using std::cout; using std::endl; int foo(int, char) { return 0; } int main() { typedef BOOST_TYPEOF(foo) foo_type;; typedef boost::function_traits<foo_type> function_traits; cout << typeid(foo_type).name() << endl; cout << function_traits::arity << endl; cout << typeid(function_traits::arg1_type).name() << ","; cout << typeid