Kata

This Kata is about picking two unique random elements from a given closed range. If the range has zero or one element then return nil.

Swift Standard Library has a greate methods to pick a random elements from a given range but any method to pick more than one at once.

The resulting method can be used in a Quiz Questions which asks to compare two numerical random elements from a pre-defined range.

Example: Given Closed Range: range = 0...10

correct result tuple:

1. (0, 1)
2. (1, 0)
3. (10, 2)
4. (3, 8) etc.

not correct result tuple:

1. (0, 0)
2. (3, 3) etc.