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unordered_map insert in C++ STL

Last Updated: 19 December 2018

The unordered_map::insert() is a built-in function in C++ STL which is used to insert elements with a particular key in the unordered_map container. This function increase ...read more

cpp-unordered_map-functions

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 otherwise it return FALSE.Syntax: uno ...read more

cpp-unordered_map-functions

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 becomes zero. Syntax: unordere ...read more

C++

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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 function which takes a single a ...read more

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unordered_map count() in C++

Last Updated: 26 September 2018

The unordered_map::count() is a builtin method in C++ which is used to count the number of elements present in an unordered_map with a given key.Note: As unordered_map doe ...read more

C++

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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 container in the unordered_map c ...read more

cpp-unordered_map-functions

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 container or in any of its bucket ...read more

cpp-unordered_map-functions

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 the map.Syntax:size_type bucke ...read more

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unordered_map at() in C++

Last Updated: 31 July 2023

Prerequisite : Unordered maps in STLUnordered_map : unordered_map is an associated container that stores elements formed by the combination of key value and a mapped value ...read more

cpp-unordered_map-functions

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

Last Updated: 11 October 2021

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 : 5, Check2 : 4Output : 5 : No ...read more

cpp-unordered_map-functions

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 used to uniquely identify the ele ...read more

cpp-unordered_map-functions

unordered_map in C++ STL

Last Updated: 10 January 2023

unordered_map is an associated container that stores elements formed by the combination of a key value and a mapped value. The key value is used to uniquely identify the e...read more

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