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flatten 2d vectors stl

priya mali answered on August 3, 2022 Popularity 5/10 Helpfulness 2/10

answer flatten 2d vectors stl

flatten 2d vectors stl

Comment

#include <vector>

template<typename T>
std::vector<T> flatten(const std::vector<std::vector<T>> &orig)
{   
    std::vector<T> ret;
    for(const auto &v: orig)
        ret.insert(ret.end(), v.begin(), v.end());                                                                                         
    return ret;
}   

int main() 
{   
    std::vector<std::vector<int>> vv; 
    vv.push_back(std::vector<int>{1, 2, 3});
    vv.push_back(std::vector<int>{10, 20});
    flatten(vv);
}

Popularity 5/10 Helpfulness 2/10 Language cpp

Source: stackoverflow.com

Tags: c++ flatten stl

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