remove element by index from vector c++
// Deletes the second element (vec[1])
vec.erase(vec.begin() + 1);
// Deletes the second through third elements (vec[1], vec[2])
vec.erase(vec.begin() + 1, vec.begin() + 3);remove element by index from vector c++
// Deletes the second element (vec[1])
vec.erase(vec.begin() + 1);
// Deletes the second through third elements (vec[1], vec[2])
vec.erase(vec.begin() + 1, vec.begin() + 3);remove value from vector c++
#include <algorithm>
#include <vector>
// using the erase-remove idiom
std::vector<int> vec {2, 4, 6, 8};
int value = 8 // value to be removed
vec.erase(std::remove(vec.begin(), vec.end(), value), vec.end());c++ remove element from vector
vector.erase(position) // remove certain position
// or
vector.erase(left,right) // remove positions within rangeerase element from vector c++
// erase element from vector by its index
vector<string> strs {"first", "second", "third", "last"};
string element = "third"; // the element which will be erased
for(int i=0;i<strs.size();i++)
{
if(strs[i] == element)
strs.erase(strs.begin()+i);
}how to delete an element in vector pair in cpp
#include <iostream>
#include <utility>
#include <vector>
using namespace std;
int main()
{
vector< pair<int, int> > v;
int N = 5;
const int threshold = 2;
for(int i = 0; i < N; ++i)
v.push_back(make_pair(i, i));
int i = 0;
while(i < v.size())
if (v[i].second > threshold)
v.erase(v.begin() + i);
else
i++;
for(int i = 0; i < v.size(); ++i)
cout << "(" << v[i].first << ", " << v[i].second << ")\n";
cout << "Done" << endl;
}erase an element from vector c++
#include<bits/stdc++.h>
using namespace std;
int main(){
vector<int> v;
//Insert values 1 to 10
v.push_back(20);
v.push_back(10);
v.push_back(30);
v.push_back(20);
v.push_back(40);
v.push_back(20);
v.push_back(10);
vector<int>::iterator new_end;
new_end = remove(v.begin(), v.end(), 20);
for(int i=0;i<v.size(); i++){
cout << v[i] << " ";
}
//Prints [10 30 40 10]
return 0;
}
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