C++ - List splice() Function

The C++ list::splice function is used to delete all occurrences of specified element from the list container.

Syntax

C++98
C++11

//entire list
void splice (iterator position, list& x);
  
//single element
void splice (iterator position, list& x, iterator i);

//range of elements
void splice (iterator position, list& x, iterator first, iterator last);

//entire list
void splice (const_iterator position, list& x);
void splice (const_iterator position, list&& x);

//single element 
void splice (const_iterator position, list& x, const_iterator i);
void splice (const_iterator position, list&& x, const_iterator i);

//range of elements
void splice (const_iterator position, list& x,
             const_iterator first, const_iterator last);
void splice (const_iterator position, list&& x,
             const_iterator first, const_iterator last);

Parameters

val Specify the value of the element which need to be spliced from the list.

Return Value

None.

Time Complexity

Linear i.e, Θ(n).

Example:

In the below example, the list::splice function is used to delete all occurrences of specified element from the list called MyList.

#include <iostream>
#include <list>
using namespace std;
 
int main (){
  list<int> MyList{10, 20, 30, 40, 50, 30, 30, 40};
  list<int>::iterator it;

  cout<<"MyList contains: ";
  for(it = MyList.begin(); it != MyList.end(); it++)
    cout<<*it<<" ";

  //Remove all occurrences of 30 from the list
  cout<<"\n\nRemove all occurrences of 30 from the MyList.\n";
  MyList.splice(30);
  
  cout<<"Now, MyList contains: ";
  for(it = MyList.begin(); it != MyList.end(); it++)
    cout<<*it<<" ";

  return 0;
}

The output of the above code will be:

MyList contains: 10 20 30 40 50 30 30 40 

Remove all occurrences of 30 from the MyList.
Now, MyList contains: 10 20 40 50 40

❮ C++ - List