How to get the index of a value in a vector using for_each?

Question

I have the following code (compiler: MSVC++ 10):

std::vector data;
data.push_back(1.0f);
data.push_back(1.0f);
data.push_back(2.0f);

// lambda          


        

Answer 1

In C++14 thanks to generalized lambda captures you can do something like so:

std::vector v(10);
std::for_each(v.begin(), v.end(), [idx = 0] (int i) mutable {
    // your code...
    ++idx; // 0, 1, 2... 9
});