std::transform应用给定的函数到某个/些输入范围中的元素,并将结果存储到从d_first开始的输出范围。 1)应用一元函数unary_op到[first1,last1)中的元素。 如果unary_op使以下某个范围中的某个迭代器失效,或者修改了以下某个范围中的某个元素,那么行为未定义: [first1,last1]。 包含std::distance(f
std::transformdoes not guarantee in-order application ofunary_oporbinary_op. To apply a function to a sequence in-order or to apply a function that modifies the elements of a sequence, usestd::for_each. Example Run this code Output: ...
1)等价于transform_reduce(first1, last1, first2, init, std::plus<>(),std::multiplies<>()),实际上是默认的std::inner_product的等效并行版本。 3)应用transform到来自范围[first1,last1)和从first2开始的包含std::distance(first1, last1)个元素的范围的每对元素,并在reduce上与初始值init一同规约各...
end(), std::ostream_iterator<int>(std::cout, " "), 0, std::plus<int>{}, times_10); std::cout << "\n10 times inclusive sum: "; std::transform_inclusive_scan(data.begin(), data.end(), std::ostream_iterator<int>(std::cout, " "), std::plus<int>{}, times_10); std::...
常用的一些并行算法包括std::for_each、std::transform、std::reduce等,它们都有对应的并行版本std::for_each_par、std::transform_par、std::reduce_par等。 使用并行算法时,需要注意数据之间是否存在数据竞争或其他线程安全问题。确保共享数据被正确地保护起来,以避免潜在的错误。 需要注意的是,并行算法库只能在...
auto clone = [](std::unique_ptr<Base> const& pointer){ return pointer->cloneBase(); }; std::transform(begin(source), end(source), std::inserter(destination, end(destination)), clone); 或者: for (auto const& pointer : source) { destination.insert(pointer->cloneBase()); } ...
{//web::json::value &headersJson = multimap2json(headers);std::transform(method.begin(), method.end(), method.begin(), towupper);//towupper towlowerweb::http::method methodPara =utility::conversions::to_string_t(method);//web::uri uri(utility::conversions::to_string_t(url)); ...
示例:(style) Consider using std::transform algorithm instead of a raw loop. [useStlAlgorithm]。 解决办法:将循环便利替换为STL标准库算法函数。 引用传递问题。 示例:(performance) Function parameter ‘f’ should be passed by reference. 解决办法:在声明function时,能用引用传递的尽量使用引用传递,尽量避免...
std::transform_reduce(std::cbegin(a), std::cend(a), 0, std::plus<>{}, times_ten); // == 60 const std::array<int, 3> b{ 1, 2, 3 }; const auto product_times_ten = [](const auto a, const auto b) { return a * b * 10; }; std::transform_reduce(std::cbegin(a),...
What Is the Value of std::indirect<T>? ArticlePopular Story// jiixyj.github.io preCICE A coupling library for partitioned multi-physics simulations, including, but not restricted to fluid-structure interaction and conjugate heat transfer simulations. ...