select() columns using their positions

Dear useRs,

I'm still trying to learn tidyverse syntax.

I would like to select() columns based on their positions/indices, but
I
cannot find a way to do that (I've seen a lot about doing that for
rows,
but I could not find anything for columns). I thought it would be
obvious, but I cannot find it.

Basically, I am looking for something like:
mydata %>%
? select( vector_of_indices )
I know that the pipe is useless here, but there are more steps in my
real code.

The helper num_range() works only when headers contains the positions
(e.g. "x1, x2...").

Of course, it's easy using "[", but I expected it would be possible
with
select() as well; it would make the code more readable than:
mydata %>%
? .[ vector_of_indices ]

Thank you for your help.
Ivan