forward_list::remove() in C++ STL
In this article we will be discussing the working, syntax and examples of forward_list::remove() and forward_list::remove_if() functions in C++.
What is a Forward_list in STL?
Forward list are sequence containers that allow constant time insert and erase operations
anywhere within the sequence. Forward list are implement as a singly-linked lists. The ordering
is kept by the association to each element of a link to the next element in the sequence.
What is forward_list::remove()?
forward_list::remove() is an inbuilt function in C++ STL which is declared in header file. remove() is used to removes all the elements from the forward_list. The container size is decresed by the number of elements removed.
Syntax
flist_container1.remove(const value_type& value );
This function can accept only one parameter, i.e. the value which is to be inserted at the
beginning.
Return Value
This function returns nothing
Example
In the below code we are
Live Demo
#include <forward_list>
#include <iostream>
using namespace std;
int main(){
forward_list<int> forwardList = {2, 3, 1, 1, 1, 6, 7};
//List before applying remove operation
cout<<"list before applying remove operation : ";
for(auto i = forwardList.begin(); i != forwardList.end(); ++i)
cout << ' ' << *i;
//List after applying remove operation
cout<<"\nlist after applying remove operation : ";
forwardList.remove(1);
for(auto i = forwardList.begin(); i != forwardList.end(); ++i)
cout << ' ' << *i;
}Output
If we run the above code it will generate the following output
list before applying remove operation : 2, 3, 1, 1, 1, 6, 7
list after applying remove operation : 2, 3, 6, 7
Published on 02-Mar-2020 13:42:12
