std::string (std::wstring),反之亦然。
While working with COM in C++ the strings are usually of BSTR data type. Someone can use BSTR wrapper like CComBSTR or MS's CString. But because I can...
C ++ 0x是否支持将std :: wstring转换为UTF-8字节序列?
I saw that C++0x will add support for UTF-8, UTF-16 and UTF-32 literals. But what about conversions between the three representations ? 我看到C ++ 0x将添加...
如何使用std::排序对和引用
Is there a way to get sort working with collections of pairs where one element is a reference? I've code where I want to sort a std::vector<Ty>,...
保留后填充[重复]后std :: vector大小不会更新
This question already has an answer here: 这个问题在这里已有答案: std::vector::resize() vs. std::vector::reserve() 6 answers std :: vector :: resize()与...
为什么std::fstream类不采用std::string?
This isn't a design question, really, though it may seem like it. (Well, okay, it's kind of a design question). What I'm wondering is why the C++ std:...
将std::tuple转换为std::array C++11
If I have std::tuple<double, double, double> (where the type is homogeneous), is there a stock function or constructor to convert to std::array&...
C++11:借助std::tuple实现CSV的读写
一直想写个CSV读写的模板,但是接口的定义一直是个问题。CSV每列都可以任意映射成C++基本类型,怎么把接口定义得既通用又灵活?最近发现C++11引入了tuple,接口也可以像python一样的方便漂亮,而且不再依赖boost库,真正做到Windows/Linux一套代码。 #ifndef _C...
如何从移动捕获lambda表达式创建一个std :: function?
I'm trying to create an std::function from a move-capturing lambda expression. Note that I can create a move-capturing lambda expression without probl...
如何使用模板将lambda转换为std::函数
Basically, what I want to be able to do is take a lambda with any number of any type of parameters and convert it to an std::function. I've tried the ...
使用带有lambda的decltype和std :: function
This works ... 这有效...... auto x = 4;typedef decltype(x) x_t;x_t y = 5; ... so why doesn't this? ......为什么不呢? int j = 4; auto func = [&] (int i) {...
C++11新特性,利用std::chrono精简传统获取系统时间的方法
一、传统的获取系统时间的方法传统的C++获取时间的方法须要分平台来定义。相信百度代码也不少。我自己写了下,例如以下。const std::string getCurrentSystemTime(){if (PLATFORM_ANDROID || PLATFORM_IOS){struct timeva...
C++11 std::chrono库详解
chrono是一个time library, 源于boost,现在已经是C++标准, 今天我们一起来看看它的用法。 要使用chrono库,需要#include<chrono>,其所有实现均在std::chrono namespace下。注意标准库里面的每个命名空间代表了一个独立的概念...
[C++11]std::chrono时间处理类
时间类分为:时间,时间点,时间间隔 时间点相减就是时间间隔。不用考虑细节。时间点相减之后需要 用duration_cast转化为某一单位ns,ms等。 时间间隔的单位可以自己定义如下: 也可以用标准的ms,ns等 typedef duration < /* see rep below */...
c++11 时间类 std::chrono
概念: chrono库:主要包含了三种类型:时间间隔Duration、时钟Clocks和时间点Time point。 Duration:表示一段时间间隔,用来记录时间长度,可以表示几秒钟、几分钟或者几个小时的时间间隔。 template <class Rep, class Period =...
C++,std::shared_future的使用
今天给大家分享一个类似多线程任务的方法,具体如下:std::shared_future<int> tmp = std::async(p1,p2,p3);int tmpInt = tmp.get();1、std::future是一个非常有用也很有意思的东西,简单说std::future提供...
HOW TO REPLACE ALL OCCURRENCES OF A CHARACTER IN A STD::STRING
From: http://www.martinbroadhurst.com/replacing-all-occurrences-of-a-character-in-a-stdstring.html This can be done using the standard library or Bo...
如何在Python ctypes中处理c++返回类型std::vector ?
I cannot find how ctypes will bridge the gap between std::vector and Python; no where on the internet is the combination mentioned. Is this bad practi...
将c字符串有效地转换为std::vector
I want to convert a C-style string into a byte-vector. A working solution would be converting each character manually and pushing it on the vector. Ho...
std vector C ++ - 深或浅副本
I wonder whether copying a vector I am copying the vector with its values (whereas this is not working with array, and deep copy need a loop or memcpy...
使用managed_shared_object创建的std :: vector是否需要同步?
I succesfully compiled the Creating vectors in shared memory example from Boost. I'm uncertain if insertions into the constructed vector from multiple...