fork download
copy 
  1. #include <cstdio>
  2. #include <vector>
  3. #include <algorithm>
  4.  
  5. void print_vec(const char * msg = 0, const std::vector<int> & v = std::vector<int>()) {
  6.     printf("%s", msg ? msg : "");
  7.     for (auto x : v)
  8.         printf(" %d", x);
  9.     printf("\n");
  10. }
  11.  
  12. template <class _Container, class _Predicate>
  13. void remove_if_and_resize(_Container & c, _Predicate p) {
  14.     auto new_end = std::remove_if(c.begin(), c.end(), p);
  15.     c.erase(new_end, c.end());    
  16. }
  17.  
  18. int main() {
  19.     {
  20.     int value = 3;
  21.     std::vector<int> v = {1, 2, 3, 4, 5};
  22.     print_vec("Before :", v);
  23.     auto new_end = std::remove_if(v.begin(), v.end(), [value] (int x) { return x < value; });
  24.     print_vec("After remove_if :", v);
  25.     v.erase(new_end, v.end());
  26.     print_vec("After erase:", v);
  27.     }
  28.  
  29.     {
  30.     int value = 2;
  31.     std::vector<int> v = {1, 2, 3, 4, 5};
  32.     print_vec("Before :", v);
  33.     remove_if_and_resize(v, [value] (int x) { return x > value; });
  34.     print_vec("After remove_if_and_resize :", v);
  35.     }
  36.     return 0;
  37. }
  38.  
Success #stdin #stdout 0s 3460KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Before : 1 2 3 4 5
After remove_if : 3 4 5 4 5
After erase: 3 4 5
Before : 1 2 3 4 5
After remove_if_and_resize : 1 2
https://ideone.com/dHjA38
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!