一、C++ vector::data()函数#返回值类型:vector的基类 返回值:Returns a pointer such that [data(), data() + size()] is a valid range. For a non-empty %vector, data() == &front(). 等价于:&vector::front()例子//基类型定义 class Toke
data() 返回指向底层数组的指针 size() 返回当前元素数量 capacity() 返回当前分配的容量 reserve(size_t n) 预留至少 n 个元素的存储空间 resize(size_t n) 将元素数量调整为 n clear() 清空所有元素 insert(iterator pos, val) 在指定位置插入元素 erase(iterator pos) 删除指定位置的元素 begin() / end...
2*old_size:1;//3 iterator new_start =data_alloctor:allocate(len);//4 iterator new_finish=new_start;try{ new_finish=uninitialized_copy(start,position,new_start);//5construct(new_finish,x);//6 ++new_finish;//6 new_finish=uninitialized_copy(position,finish,new_finish);//7...
# 代码位于api/core/rag/datasource/vdb/pgvector/pgvector.py def _create_collection(self, dimension:int): cache_key=f"vector_indexing_{self._collection_name}" lock_name=f"{cache_key}_lock"WITHredis_client.lock(lock_name, timeout=20): collection_exist_cache_key=f"vector_indexing_{s...
vector::data發行項 2013/03/26 本文內容 傳回值 範例 需求 請參閱 傳回指向儲存在向量的第一個項目。 複製 const_pointer data() const; pointer begin(); 傳回值 指標。 vector Class 的第一個項目是成功或空的 vector的位置。 範例 複製 // vector_data.cpp // compile with: /EHsc #...
cpp ) add_executable(${TZ_MAIN_NAME} ${TZ_MAIN_INCLUDE} ${TZ_MAIN_INC} ${TZ_MAIN_SRC} ) set_property(TARGET ${TZ_MAIN_NAME} PROPERTY FOLDER "UsingVector") 项目对应的名字叫VectorStroreData, 具体的代码示例如下:
master data_struct/vector/vector/vector.cpp Go to file Go to file T Go to line L Copy path Cannot retrieve contributors at this time 168 lines (158 sloc) 2.33 KB Raw Blame #define _CRT_SECURE_NO_WARNINGS 1 #include <iostream> #include<algorithm> #include<assert.h> #include...
constexprconstT*data()constnoexcept; (C++20 起) 返回指向作为元素存储工作的底层数组的指针。指针满足范围[data(); data() + size())始终是合法范围,即使容器为空(该情况下data()不可解引用)。 参数 (无) 返回值 指向底层元素存储的指针。对于非空容器,返回的指针与首元素地址比较相等。
//cont/vector1.cpp#include<iostream>#include<vector>#include<string>#include<algorithm>usingnamespacestd;intmain() {//create empty vector for stringsvector<string>sentence;//reserve memory for five elements to avoid reallocationsentence.reserve(5);//append some elementssentence.push_back("Hello,"...
<cpp |container |vector Returns a pointer to the underlying array serving as element storage. The pointer is such that range[data(),data()+size())is always avalid range, even if the container is empty (data()is not dereferenceable in that case). ...