为什么在 C 17 中添加了 std::reduce? 我正在寻找对std::reduce的“返回值”描述的含义的彻底解释,根据 cppreference.com,它是: 也许在我正确理解本节之后,我可以更好地确定何时应该选择std::reduce而不是std::accumulate。 由于您要求进行彻底的解释,而先前的答案仅涵盖基础知识,因此我冒昧地添加更详尽的解释。
cmake_minimum_required(VERSION 3.15) project ( testprj ) set ( PRJ_COMPILE_FEATURES ) list ( APPEND PRJ_COMPILE_FEATURES cxx_std_20 ) add_executable( ${PROJECT_NAME} main.cpp ) target_compile_features ( ${PROJECT_NAME} PRIVATE ${PRJ_COMPILE_FEATURES} ) main.cpp #include <iostream> #...
参阅 accumulate 对一个范围内的元素求和 (函数模板) transform 将一个函数应用于某一范围的各个元素,并在目标范围存储结果 (函数模板) transform_reduce (C++17) 应用一个函数对象,然后以乱序规约 (函数模板) C语言 | C++中文网
Richard Crosby Ph.D. cKathleen Ethier Ph.D. dJane Mezoff CHES, Dr.P.H. eKim Miller Ph.D. bKatina Pappas-Deluca M.A. eElsevier BVJournal of Adolescent Health Official Publication of the Society for Adolescent MedicineTeplin , L. A. , Elkington , K. S. , McClelland , G. M. , ...
typename std::iterator_traits<InputIt>::value_type reduce( InputIt first, InputIt last); (1) (since C++17) template<class ExecutionPolicy, class ForwardIt> typename std::iterator_traits<ForwardIt>::value_type reduce( ExecutionPolicy&& policy, ForwardIt first, ForwardIt last); (2) (since...
\work\modern_cmake_work\ModernCMake\codes\moderncpp\reduce\reduce03\build> .\Release\testprj.exe std::accumulate result 5000003.500000 took 57.841500 ms std::reduce sequential v1 result 5000003.500000 took 17.135800 ms std::reduce sequential v2 result 5000003.500000 took 19.725300 ms std::reduce ...
begin(), 0.0 ); std::cout << result << '\n'; } 输出: 10007参阅accumulate 对一个范围内的元素求和 (函数模板) transform 将一个函数应用于某一范围的各个元素,并在目标范围存储结果 (函数模板) reduce (C++17) 类似std::accumulate,但不依序执行 (函数模板) C语言 | C++中文网 ...
Borges CM, Pathela P, Pirillo R, Blank S. 2015. Targeting the use of pooled HIV RNA screening to reduce cost in health department STD clinics: New York City, 2009-2011. Public Health Rep 130:81- 86. https://doi.org/ 10.1177/003335491513000110....
The intervention targeted (a) decision-making about safer sex goals, (b) social skills for achieving safer sex, and (c) acceptance of negative thoughts and feelings. Compared to the control group at 6-months follow-up, treatment participants reported fewer sexual partners, fewer nonmonogamous ...
Metzler C, Biglan A, Noell J, Ary D, Ochs L. A randomized controlled trial of a behavioural intervention to reduce high−risk sexual behaviour among adolescents in high-risk sexual behaviour among adolescents in STD clinics. Behav Ther. 2000; 31 :27–54. doi: 10.1016/S0005-7894(00)...