Reverses the elements in an array in place and returns a reference to the same array.
reverse()
The original array after modification.
["g", "i", "f"].reverse()
["f", "i", "g"]
var original = [1, 2, 3]
var reversed = original.reverse()
print(original)
print(reversed)
print(original === reversed)
3,2,1
3,2,1
true