1)find搜索等于(用operator==比较)value的元素。 3)find_if搜索谓词p对其返回true的元素。 5)find_if_not搜索谓词q对其返回false的元素。 2,4,6)同(1,3,5),但按照policy执行。 这些重载只有在满足以下所有条件时才会参与重载决议: std::is_execution_policy_v<std::decay_t<ExecutionPolicy>>是true。
find_if, std::experimental::ranges::find_if_not From cppreference.com < cpp | experimental | ranges C++ Compiler support Freestanding and hosted Language Standard library Standard library headers Named requirements Feature test macros (C++20) Language support library Concepts library (C++20)...
std::all_of,std::any_of,std::none_ofTake an array of elements and a predicate as an input. Call predicate on individual input elements, and return true if for all/any/none elements, predicate returns true. std::find_ifTake sequence of elements, and a predicate. Return first element in...
std::ranges::find_last, std::ranges::find_last_if, std::ranges::find_last_if_notC++ 算法库 受约束算法 在标头 <algorithm> 定义 调用签名 (1) template< std::forward_iterator I, std::sentinel_for<I> S, class T, class Proj = std::identity > requires std::indirect_binary_...
External Links−Non-ANSI/ISO Libraries−Index−std Symbol Index C reference C89,C95,C99,C11,C17,C23│Compiler supportC99,C23 Language Basic concepts Keywords Preprocessor Expressions Declaration Initialization Functions Statements Headers Type support ...
5)Implicitly convertstto a string viewsvas if bystd::basic_string_view<CharT, Traits>sv=t;, then finds the last substring equal to the contents ofsv. This overload participates in overload resolution only ifstd::is_convertible_v<constStringViewLike&, ...
autopositionOf42 =std::find(myCollection,42); 这就是有关范围的提案在C++ 20里的目标(同时还有许多其他功能)。但这个功能即使在C++ 98中也很容易模拟,只需要将调用STL算法的语句包裹在一个接受范围的函数中即可: template<typenameRange,typenameValue> ...
{std::cout<<"last subsequence is at: "<<std::distance(v.begin(), result)<<"\n";}std::vector<int>t2{4,5,6};result=std::find_end(v.begin(), v.end(), t2.begin(), t2.end());if(result==v.end()){std::cout<<"subsequence not found\n";}else{std::cout<<"last ...
insert(2); std::cout << set << '\n'; set.erase(1); std::cout << set << "\n\n"; std::set<int> keys{3, 4}; for (int key : keys) { if (set.contains(key)) std::cout << set << " contiene " << key << '\n'; else std::cout << set << " no contiene " <...
#include <iostream>#include <set>intmain(){std::set<int>example={1,2,3,4};if(example.contains(2)){std::cout<<"Found\n";}else{std::cout<<"Not found\n";}} Output: Found See also find finds element with specific key (public member function) ...