How to exchange elements in swift array?

Question

I have one simple array like:

var cellOrder = [1,2,3,4]

I want to exchange elements like suppose a second element with first element.

A

Answer 1

Use swap:

var cellOrder = [1,2,3,4]
swap(&cellOrder[0], &cellOrder[1])

Alternately, you can just assign it as a tuple:

(cellOrder[0], cellOrder[1]) = (cellOrder[1], cellOrder[0])