How to generate a random number in Swift without repeating the previous random number?

Question

I'm pretty new to Swift and programming logic in general so bear with me

How can you generate a random number between 0 and 9 in Swift without repeating the last generated number? As in the same number won't come up twice in a row.

Answer 1

my solution, i think its easy to understand

var nums = [0,1,2,3,4,5,6,7,8,9]

while nums.count > 0 {

    // random key from array
    let arrayKey = Int(arc4random_uniform(UInt32(nums.count)))

    // your random number
    let randNum = nums[arrayKey] 

    // make sure the number isnt repeated
    nums.swapAt(arrayKey, nums.count-1)
    nums.removeLast()
}