Question

How to remove all consecutive duplicate elements from std::forward_list in C++

Answer 1

#include <iostream>
#include <forward_list>
 
int main()
{
    std::forward_list<int> fl = {1, 2, 2, 7, 7, 4, 1, 1, 8, 8, 8, 9};
 
    std::cout << "before:";
    for (auto val : fl)
        std::cout << ' ' << val;
    std::cout << '\n';
 
    fl.unique();
    std::cout << "after:";
    for (auto val : fl)
        std::cout << ' ' << val;
    std::cout << '\n';
}


 
/*
run:
   
before: 1 2 2 7 7 4 1 1 8 8 8 9
after: 1 2 7 4 1 8 9
  
*/

 

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