cpp-unordered_map-functions

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Important functions of STL Components in C++

Last Updated: 02 November 2023

[tabby title="C++"][sourcecode language="cpp"]// C++ code#include iostream#include utilityusing namespace std;int main(){ // Declaring th ...read more

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unordered_map emplace() in C++ STL

Last Updated: 28 November 2022

The unordered_map::emplace() is a built-in function in C++ STL which inserts the key and its element in the unordered_map container. It effe ...read more

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Technical Scripter 2018

unordered_map find in C++ STL

Last Updated: 26 September 2024

In C++, std::unordered_map::find function is used to search for a specific element using the key in an unordered map container. It is a memb ...read more

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unordered_map erase in C++ STL

Last Updated: 24 October 2024

in C++, std::unordered_map::erase() is a built-in function used remove elements from the unordered_map container. It is a member function of ...read more

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unordered_map insert in C++ STL

Last Updated: 29 October 2024

The std::unordered_map::insert() in C++ STL is a built-in function used to insert a key-value pair in unordered_map container. As unordered ...read more

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unordered_map empty in C++ STL

Last Updated: 12 June 2023

unordered_map::empty() function is used to check whether container size is zero or not. If container size is zero then it return TRUE otherw ...read more

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unordered_map clear in C++ STL

Last Updated: 18 December 2018

unordered_map::clear() function is used to remove all elements from the container. When this function is applied to unordered_map its size ...read more

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unordered_map hash_function() function in C++ STL

Last Updated: 17 December 2018

The unordered_map::hash_function() is a built in function in C++ STL which is used to get the hash function. This hash function is a unary ...read more

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unordered_map end( ) function in C++ STL

Last Updated: 19 September 2018

The unordered_map::end() is a built-in function in C++ STL which returns an iterator pointing to the position past the last element in the c ...read more

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unordered_map begin() in C++

Last Updated: 03 December 2021

The unordered_map::begin() is a built-in function in C++ STL which returns an iterator pointing to the first element in the unordered_map co ...read more

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unordered_map bucket() in C++ STL

Last Updated: 11 June 2021

The unordered_map::bucket() is a built-in STL function in C++ which returns the bucket number where the element with the key k is located in ...read more

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unordered_map at() in C++

Last Updated: 11 November 2024

In C++, unordered_map at() is a library function used to find the value associated with a given key in the unordered_map container. Let's lo ...read more

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Check if a key is present in a C++ map or unordered_map

Last Updated: 30 April 2024

A C++ map and unordered_map are initialized to some keys and their respective mapped values.Examples:Input : Map : 1 - 4, 2 - 6, 4 - 6Check1 ...read more

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bucket_count and bucket_size in unordered_map in C++

Last Updated: 03 January 2022

Unordered_map is an associated container that stores elements formed by the combination of key-value and a mapped value. The key value is us ...read more

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Unordered Map in C++ STL

Last Updated: 03 March 2025

In C++, unordered_map is an unordered associative container that stores data in the form of unique key-value pairs. But unlike map, unordere ...read more

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