c 2b 2b vector erase by value

1//wiki - erase-remove idiom
2// Use g++ -std=c++11 or clang++ -std=c++11 to compile.
3
4#include <algorithm>  // remove and remove_if
5#include <iostream>
6#include <vector>  // the general-purpose vector container
7
8void Print(const std::vector<int>& vec) {
9  for (const auto& i : vec) {
10    std::cout << i << ' ';
11  }
12  std::cout << '\n';
13}
14
15int main() {
16  // Initializes a vector that holds numbers from 0-9.
17  std::vector<int> v = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
18  Print(v);
19
20  // Removes all elements with the value 5.
21  v.erase(std::remove(v.begin(), v.end(), 5), v.end());
22  Print(v);
23}
24
25/*
26Output:
270 1 2 3 4 5 6 7 8 9
280 1 2 3 4 6 7 8 9
29
30*/

1#include <algorithm>
2#include <vector>
3
4// using the erase-remove idiom
5
6std::vector<int> vec {2, 4, 6, 8};
7int value = 8 // value to be removed
8vec.erase(std::remove(vec.begin(), vec.end(), value), vec.end());

1vector.erase(position) // remove certain position
2// or
3vector.erase(left,right) // remove positions within range
4

1#include<bits/stdc++.h>
2using namespace std;
3int main(){
4    vector<int> v;
5    //Insert values 1 to 10
6    v.push_back(20);
7    v.push_back(10);
8    v.push_back(30);
9    v.push_back(20);
10    v.push_back(40);
11    v.push_back(20);
12    v.push_back(10);
13
14    vector<int>::iterator new_end;
15    new_end = remove(v.begin(), v.end(), 20);
16
17    for(int i=0;i<v.size(); i++){
18        cout << v[i] << " ";
19    }
20    //Prints [10 30 40 10]
21    return 0;
22}
23C++Copy

1template <typename T>
2void remove(std::vector<T>& vec, size_t pos)
3{
4    std::vector<T>::iterator it = vec.begin();
5    std::advance(it, pos);
6    vec.erase(it);
7}