find()函数用于在unordered_set中查找指定的元素。如果查找成功,则返回该元素的迭代器;否则返回unordered_set::end()。 下面是一个使用find()函数的示例: #include<iostream>#include<unordered_set>intmain(){std::unordered_set<int>mySet={1,3,5,7,9};autoit=mySet.find(3);if(it!=mySet.end()){st...
程序1: // C++程序,说明unordered_multimap::find()函数#include<iostream>#include<unordered_map>usingnamespacestd;intmain(){//声明unordered_multimap<int,int>sample;//插入键和元素sample.insert({1,2});sample.insert({1,2});sample.insert({2,3});sample.insert({3,4});sample.insert({2,6});...
Learn how to use the C++ set find function to search for elements in a set. Understand its syntax, parameters, and examples for better implementation.
#include <algorithm> #include <iostream> #include <set> #include <unordered_set> #include <vector> int main() { using std::cout, std::endl, std::set, std::unordered_set, std::vector, std::find; int i; const long ITERATIONS = 10000000; int a[] {0, 1, 2, 3, 4, 5, 6, ...
仿函数(functor)又称为函数对象(function object)是一个能行使函数功能的类。 仿函数的语法几乎和我们普通的函数调用一样,不过作为仿函数的类,都必须重载operator()运算符, 在C++中,如果你想要定义一个结构体E并使其具有类似于Hasher的功能, 要确保E有一个名为operator()的重载方法, 这个方法允许你像调用函数一样...
This can either be a function pointer or a function object.Return value An iterator to the first element of the first pair of matching consecutive elements in the range [first,last). If no such pair is found, the function returns last.Example...
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/** Used as the `TypeError` message for "Functions" methods.*/varFUNC_ERROR_TEXT = 'Expected a function';/** Used to stand-in for `undefined` hash values.*/varHASH_UNDEFINED = '__lodash_hash_undefined__';/** Used to compose bitmasks for comparison styles.*/varUNORDERED_COMPARE_FLAG...
(public member function) operator[] access or insert specified element (public member function) count returns the number of elements matching specific key (public member function) equal_range returns range of elements matching a specific key
public member function <string> std::string::find_first_of C++98 C++11 string (1) size_t find_first_of (const string& str, size_t pos = 0) const; c-string (2) size_t find_first_of (const char* s, size_t pos = 0) const; ...