Category: unordered_set
How to Insert elements in an unordered_set in C++11
std::unordered_set provides the different overloaded versions of insert() member function to insert elements i.e. pair<iterator,bool> insert ( const value_type& val ); void insert ( InputIterator first, InputIterator last ); void insert ( initializer_list<value_type> il ); Let’s see each of them in detail Advertisements Inserting element in unordered_set by value For this we will use basic …
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std::unordered_set Basic Usage & Example
std::unordered_set is an STL container and its introduced in C++11. It provides a functionality of a Set i.e. it can contains the unique elements only. unordered_set stores the elements internally using a Hash Table. We can declare an unordered_set of a particular type only i.e. Advertisements std::unordered_set<T> setOfTypeT; Elements of Type with which an unoredered_set is declared can only …
How to initialize an unordered_set in C++11
In this article we will discuss the different ways to initialize an unordered_set. Creating an empty unordered_set and then inserting elements in it is easy. But its not the practical scenario always. Many times we need to initialize an unordered_set while creation. For that it provides different overloaded constructors and we will use some of …
Using unordered_set with custom hasher and comparision function
In this article we will discuss how to use std::unordered_set custom hasher and comparision function. Unordered_set uses the Hash table implementation to provide the set functionality. To know more about Hash Table visit the following article, Advertisements What is Hashing and Hash Table? Whenever we insert an element in unordered_set two things happen i.e. Frequently Asked: std::unordered_set …
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How to Search an element in unordered_set
In this article we will see how to search if an element is present in an unordered_set or not. std::unordered_set provides a member function find () that accepts an element of same type as set and search for that element in set. Advertisements If element is found then it returns the iterator pointing to that …
How to use Unordered_set with User defined classes – Tutorial & Example
In this article we will discuss how to use std::unordered_set with User defined classes. std::unordered_set internally implements a hash table to store the elements. To know more about Hash Table visit the following article, What is Hashing and Hash Table? Advertisements std::unordered_set uses the hasher and comparison function. For primitive data types like int, string etc. default …
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