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

I think that the simplest way is to use std::accumulate:

std::accumulate(data.begin(), data.end(), 0, [](int index, float const& value)->int{
    ...
    return index + 1;
});

This solution works with any container and it don't require a variable or custom classes.