How do you rotate (circular shift) of a Scala collection

Question

I can do this quite easily, and cleanly, using a for loop. For instance, if I wanted to traverse a Seq from every element back to itself I would do the

Answer 1

A simple method is to concatenate the sequence with itself and then take the slice that is required:

(seq ++ seq).slice(start, start + seq.length)

This is just a variant of the drop/take version but perhaps a little clearer.