Erase element from vector c++

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);

Source: stackoverflow.com

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());

Delete from front in vector c++

// Deleting first element
vector_name.erase(vector_name.begin());

// Deleting xth element from start
vector_name.erase(vector_name.begin()+(x-1));

// Deleting from the last
vector_name.pop_back();

Erase 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;
}

Source: stackoverflow.com

Similar codes

31 votes292 views1 answer
When to use struct vs class c++
C++
4 votes309 views3 answers
Fork c
C++
0 vote320 views1 answer
For loop f#
C++
1 vote329 views1 answer
What are various sections of process
C++
0 vote301 views3 answers
C++ loop through list
C++
1 vote301 views1 answer
How to create a pair of double quotes in c++
C++
1 vote332 views1 answer
For loop vector
C++
0 vote366 views1 answer
C++ insertion in astack
C++
1 vote328 views1 answer
C++ sqlite open file in other directory
C++
-2 votes327 views1 answer
How to make custom domain extension
C++