vector question

[Pat]

Hi,

I use vector<int> to store a list of numbers. Give any number X (may not be
in the vector), I am looking for an efficient way to delete all X's in the
vector.

Any suggestion?
Thanks. Pat

 

[John Harrison]

Hi,

I use vector<int> to store a list of numbers. Give any number X (may not be
in the vector), I am looking for an efficient way to delete all X's in the
vector.

Any suggestion?
Thanks. Pat

#include <algorithm>
#include <vector>

vec.erase(std::remove(vec.begin(), vec.end(), val), vec.end());

john

 

[Sumit Rajan]

Hi,

I use vector<int> to store a list of numbers. Give any number X (may not be
in the vector), I am looking for an efficient way to delete all X's in the
vector.

Any suggestion?

#include <iostream>
#include <vector>
#include <algorithm>

int main()
{


std::vector<int> v;
for (int i=0; i<10;i++)
v.push_back(i);
v.push_back(3);
v.push_back(4);

std::copy(v.begin(),v.end(),
std:stream_iterator<int>(std::cout, " "));
std::cout << '\n';

v.erase(std::remove(v.begin(),v.end(),3),v.end()); //in vector
v.erase(std::remove(v.begin(),v.end(),45),v.end()); //not in vector

std::copy(v.begin(),v.end(),
std:stream_iterator<int>(std::cout, " "));
std::cout << '\n';
}

Regards,
Sumit.

 

[Pat]

Thanks.