iOS repl.it - Randomisation Challenge Solution

randomisation.swift

let alphabet = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]

//The number of letters in alphabet equals 26

var password = alphabet[Int.random(in: 0...25)] + alphabet[Int.random(in: 0...25)] + alphabet[Int.random(in: 0...25)] + alphabet[Int.random(in: 0...25)] + alphabet[Int.random(in: 0...25)] + alphabet[Int.random(in: 0...25)]  

print(password)

let alphabet = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]

//The number of letters in alphabet equals 26

let password = alphabet.randomElement()! + alphabet.randomElement()! + alphabet.randomElement()! + alphabet.randomElement()! + alphabet.randomElement()! + alphabet.randomElement()!

print(password)

The '!' on my code refers to force unwrapping optionals. Basically what optionals are saying is, "There is a value and it is [this value] or there isn't a value at all." If there wasn't a value at all, it would be 'nil'. if tried to run with randomElement alone the code would crash as will keep running and never find a solution.

Thank you for explaining this one. I am actually trying to use the alphabet.randomElement() but I was getting compiler error -- took too long to compile. Did not know you would need the '!'.

func exercise() {
let alphabet = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"]

let password = (1...6).map { _ in alphabet.randomElement()! }.joined()

print(password)

}

let alphabet = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]
//The number of letters in alphabet equals 26

let password = (0..<6).compactMap { _ in
    alphabet.randomElement()}.joined()

print(password)

`func exercise() {

let alphabet = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]

var password = ""

for _ in 1...6{
    password += alphabet.randomElement()!
}

print(password)

}`