GeeksforGeeks

How to Extract Keys from a C++ std::map?

Last Updated: 06 August 2024

In C++, the std::map is an associative container that stores elements in key-value pairs. The keys are unique, and the map maintains a sorted order of keys based on their ...read more

How to Initialize a Static std::map<int, int> in C++

Last Updated: 02 August 2024

In C++, std::mapint, int is a commonly used container that stores key-value pairs. There are scenarios where we may want to initialize a static std::map with predefined ke...read more

Why is std::map Implemented as Red-Black Tree?

Last Updated: 01 August 2024

In C++, we commonly use std::map container of STL for storing key-value pairs in a sorted order. A frequent question arises: Why is std::map implemented as a Red-Black Tre...read more

What Requirements Must std::map Key Classes Meet to be Valid Keys?

Last Updated: 25 July 2024

In C++, std::map is a commonly used associative container that stores elements in key-value pairs, allowing for efficient data retrieval based on keys. One common question...read more

remove_if equivalent for std::map

Last Updated: 24 July 2024

The std::map in C++ is a sorted associative container that stores key-value pairs, where each key is unique. It provides efficient lookup, insertion, and deletion of eleme...read more

Floating Point Values as Keys in std:map

Last Updated: 22 July 2024

The std::map in C++ is a sorted associative container that stores key-value pairs, where each key is unique. When working with std::map, keys are typically of a type that ...read more

How to Create a Dictionary in C++?

Last Updated: 15 October 2024

A dictionary is a data structure in python that enables users to store data in the form of key-value pairs, where each key must be unique. In this article, we will learn h...read more

How to Create a Deque of Maps in C++?

Last Updated: 26 March 2024

In C++, the Standard Template Library (STL) provides a container called deque that allows efficient insertion and deletion operations at both ends of the container. A map ...read more

How to Create a Stack of Map in C++?

Last Updated: 12 March 2024

In C++, the std::stack is a container that follows the LIFO (Last In, First Out) rule, whereas std::map is an associative container that stores key-value pairs. In this ar...read more

How to Check if Map Contains a Specific Key in C++?

Last Updated: 21 October 2024

In C++, std::map is an STL container that stores key-value pairs in a sorted order based on the keys. In this article, we will learn how to check if an element with the gi...read more

How to Create a Map of Maps in C++?

Last Updated: 05 March 2024

In C++, maps are associative containers provided by the STL library of C++, that allow the users to store data in key-value pairs where the keys must be unique. In this ar...read more

How to Add Multiple Key-Value Pairs to a Map in C++?

Last Updated: 05 March 2024

In C++, a map is a container that stores elements in key-value pairs, where each key is unique and associated with a value. In this article, we will learn how to add multi...read more

How to Access a Value in a Map Using a Key in C++?

Last Updated: 23 October 2024

In C++, std::map container store data in the form of key-value pairs where keys are associated with the given value. In this article, we will learn how to access a value i...read more

How to Convert a Map of Set of Pairs in C++?

Last Updated: 29 February 2024

In C++, a map can be converted to a set of pairs. This can be useful when you want to create a set of pairs from a map, where each pair contains a key and a value. In this...read more

Range-Based For Loop with a Map in C++

Last Updated: 28 February 2024

In C++, a map is a container that stores elements formed by a combination of a key value and a mapped value. A range-based for loop is a feature added in C++11 to iterate ...read more