2024年11月1日 · std::map is a sorted associative container that contains key-value pairs with unique keys. Keys are sorted by using the comparison function Compare. Search, removal, and insertion operations have logarithmic complexity. Maps are usually implemented as …

Maps are associative containers that store elements formed by a combination of a key value and a mapped value, following a specific order. In a map, the key values are generally used to sort and uniquely identify the elements, while the mapped values store …

2025年2月28日 · The std::map::insert() is a built-in function of C++ STL map container which is used to insert new elements into the map. In this article, we will learn how to use map::insert() function in our C++ programs.

2024年3月29日 · 本文详细介绍了C++STL中的map容器，涉及其初始化、赋值、插入、修改、删除操作，以及pair结构的使用和自定义排序规则。 重点讲解了构造函数、赋值操作符、容量查询和修改值的方法。 注：整理一些突然学到的C++知识，随时mark一下. STL 中的map是一个关联容器，它存储的元素都是 键值对 （key-value pair），并且 根据键（key）自动排序的容器。 map …

2021年11月29日 · map (std:: initializer_list < value_type > init, const Compare & comp = Compare (), const Allocator & alloc = Allocator ());

Constructs an empty container, with no elements. Constructs a container with as many elements as the range [first,last), with each element constructed from its corresponding element in that range. Constructs a container with a copy of each of the elements in x.

2025年2月18日 · Inserts element (s) into the container, if the container doesn't already contain an element with an equivalent key. 1-3) Inserts value. Overload (2) is equivalent to emplace(std::forward<P>(value)) and only participates in overload resolution if std::is_constructible<value_type, P&&>::value==true.

Exchanges the elements of two maps or multimaps. Provides a function object that can compare the elements of a map by comparing the values of their keys to determine their relative order in the map.

map はユニークな要素を格納する連想コンテナの一種であり、キーとそれに対応する値を格納する。 連想コンテナは特にそれらキーによる要素アクセスが効率的になるようよう設計されたコンテナである（要素への相対位置または絶対位置によるアクセスが効率的であるシーケンシャルコンテナとは異なる）。 内部的には、 map 内の要素は、コンテナの構築時に設定された 狭義 …

Used for the storage and retrieval of data from a collection in which each element is a pair that has both a data value and a sort key. The value of the key is unique and is used to automatically sort the data. The value of an element in a map can be changed directly. The key value is a constant and can't be changed.