如果std::allocator_traits<allocator_type>::propagate_on_container_swap::value 是true,那么就会用对非成员 swap 的无限定调用进行分配器的交换。否则,不交换它们(且在 get_allocator() != other.get_allocator() 时行为未定义)。 (C++11 起)参数other -
constexprvoidswap(vector&other)noexcept(/* see below */); (since C++20) Exchanges the contents and capacity of the container with those ofother. Does not invoke any move, copy, or swap operations on individual elements. All iterators and references remain valid. Theend()iterator is invalidated...
swap,std::swapend() clear,operator=,assignAlways. reserve,shrink_to_fitIf the vector changed capacity, all of them. If not, none. eraseErased elements and all elements after them (includingend()). push_back,emplace_backIf the vector changed capacity, all of them. If not, onlyend(). ...
swap,std::swapend() clear,operator=,assignAlways. reserve,shrink_to_fitIf the vector changed capacity, all of them. If not, none. eraseErased elements and all elements after them (includingend()). push_back,emplace_backIf the vector changed capacity, all of them. If not, onlyend(). ...
classSolution {public:intremoveElement(vector<int>& nums,intval) {if( nums.size()==0)return0;intlast = nums.size()-1;while( nums[last]==val && last>0) last--;for(inti=0; i<=last; ++i ) {if( nums[i]==val ) { std::swap(nums[i], nums[last]); ...
vector<int>::iterator iter=vec.iterator();autoiterAuto = vec.iterator();//相比较更方便 1.3,统一初始化语法 C++ 11 使用统一的大括号表示初始化 std::strings("hello");intm=int();//默认初始化 default initialization 在某些情况下,可用将 = 用于相同目的 ...
map 不为空的实现；标准库的一些其他容器是能保证被移动构造给另一个对象后一定为空的，比如vector（...
std::swap(*pivot, *next_larger_pivot);//reverse the pivot's right elementsstd::reverse(pivot+1, num.end()); } } Tips: 上网搜搜Next Permutation的算法,分四步: 1. 从右往左 找左比右小的左 记为pivot 2. 从右往左 找第一个比pivot大的 记为next_larger_pivot ...
Using swapexchanges the contents of two containers of the same type. After the call to swap, the elements in the two containers are interchanged: vector<string> svec1(10); // vector with ten elements vector<string> svec2(24); // vectorwith 24 elements swap(svec1, svec2)...
typedef vector<VI> VVI; typedef vector<VDB> VVDB; typedef vector<VPII> VVPII; typedef unordered_map<int,int> UMPII; typedef map<int,int> MPII; typedef set<int> SETI; typedef stack<int> STI; typedef queue<int> QI;