Distinguish between hidden and active buffers in Vim

Question

Is there a way to distinguish between hidden and active buffers in Vim?

I need to determine if a buffer is active in a window so I can toggle it.
Tried bufloaded, bufexists and buflisted but they all return 1 for both active and hidden buffers.

(I have set hidden and set bufhidden=hide in my vimrc)

Answer 1

Use bufwinnr() to check if a buffer is open in a window. The result is -1 if it is not.

Answer 2

You can use :ls to see a list of all buffers. Buffers with a 'h' next to the buffer number are hidden. 'a' indicates active buffer.