#include<iostream>#include<vector>intmain(){std::vector<int>vec={1,2,3,4,5,6};autoerased_count=std::erase_if(vec,[](intx){returnx%2==0;});// 删除所有偶数std::cout<<"Erased "<<erased_count<<" elements.\n";for(inti:vec
erase_if(std::unordered_map<Key,T,Hash,KeyEqual,Alloc>&c, Pred pred); (C++20 起) 从容器中擦除所有满足谓词pred的元素。等价于 autoold_size=c.size();for(autoi=c.begin(), last=c.end();i!=last;){if(pred(*i)){i=c.erase(i);}else{++i;}}returnold_size-c.size(); ...
vct.erase(std::remove_if(vct.begin(), vct.end(), IsOdd), vct.end()); 采用erase直接删除指定规则元素,需要注意的是,vector使用erase删除元素,其返回值指向下一个元素,但是由于vector本身的性质(存在一块连续的内存上),删掉一个元素后,其后的元素都会向前移动,所以此时指向下一个元素的迭代器其实跟刚刚被...
erase_if(std::basic_string<...>&c, Pred pred); (2)(C++20 起) 1)从容器中擦除所有比较等于value的元素。等价于 autoit=std::remove(c.begin(), c.end(), value);autor=std::distance(it, c.end());c.erase(it, c.end());returnr; ...
(since C++20) Erases all elements that satisfy the predicate pred from c. Equivalent to auto old_size = c.size(); for (auto first = c.begin(), last = c.end(); first != last;) { if (pred(*first)) first = c.erase(first); else ++first; } return old_size - c.size();...
(since C++20) Erases all elements that satisfy the predicate pred from c. Equivalent to auto old_size = c.size(); for (auto first = c.begin(), last = c.end(); first != last;) { if (pred(*first)) first = c.erase(first); else ++first; } return old_size - c.size();...
(C++20 起) 从c 中擦除所有满足谓词 pred 的元素。 等价于 auto old_size = c.size(); for (auto first = c.begin(), last = c.end(); first != last;) { if (pred(*first)) first = c.erase(first); else ++first; } return old_size - c.size();...
c.erase(std::remove_if(c.begin(),c.end(),IsOdd),c.end()); cout<<"after erase remove_if Odd, v_size: "<<c.size()<<endl; ShowVec(c); vector<int>vct; for(inti=0;i<1000000;i++) { vct.push_back(i); } clock_tstart_time=clock(); ...
erase_if(std::forward_list<T,Alloc>& c, Pred pred); (2) (C++20 起) 1) 从容器中擦除所有比较等于 value 的元素。等价于 return c.remove_if([&](auto& elem) { return elem == value; }); 。 2) 从容器中擦除所有满足 pred 的元素。等价于 return c.remove_if(pred); 。 参数 c -...
2)Erases all elements that satisfy the predicatepredfrom the containerc. Equivalent toreturnc.remove_if(pred);. Parameters c-container from which to erase value-value to be removed pred-unary predicate which returns trueif the element should be erased. ...