Do you wonder to ask how to get index of a sorted array in C++. The answer is not straightforward, but tangible with C++11 lambda. Keep it in your C++ toolbox, you might need it quite often. I hope people will include some ways to do it easily in C++ next version.
See you in the next post. Happy 2018 with productivity.template <typename T> vector<int> sort_indexes(const vector<T> &v) { // initialize original index locations vector<int> idx(v.size()); iota(idx.begin(), idx.end(), 0); // sort indexes based on comparing values in v sort(idx.begin(), idx.end(), [&v](size_t i1, size_t i2) {return v[i1] < v[i2];}); return idx; }
