Switch Case Playground files

import UIKit

// Personalized greeting
//
// Create a function that gives a personalized greeting. This function takes two parameters: name and owner.
//
// Use conditionals to return the proper message:
//
// case                 return
// name equals owner    'Hello boss'
// otherwise            'Hello guest'
//https://www.hackingwithswift.com/files/pro-swift-sample.pdf
//


var str = "Hello, playground"
let name = "fourCandles"

switch name {
case "ronnie":
    print("Hello, Ronnie Barker!")
    
case "fourCandles":
    print("Hello, Ronnie Corbett!")
default:
    print( "Autentication failed")
}

//Matching two values

let password = "C0rb3tt"
let ipAddress = "192.168.0.1"

let authentication = (name, password, ipAddress)

switch authentication {
//case (_, _, _):  //using "_" for all values will not allow matching of any of the other cases
//    print("You could be anybody!")
case ("ronnie", "b@rk3r", _): //"_" here means that the third value is not required for a match
    print("Hello, Ronnie Barker!")
case ("fourCandles", let password, _): //the let keyword allows a value to be recovered
    print("Hello, Ronnie Corbett your password was \(password)")
default:
    print("Who are you?")
}

//Using claculated values

func foxTrot(number: Int) -> String{
    switch (number % 7 == 0, number % 11 == 0) {
    case (true, true):
        return "You win FoxTrot"
    case (true, false):
        return "Fox"
    case (false, true):
        return "Trot"
    case (false, false):
        let badTry = String(number)
        return badTry + " is not a winning number.  Try again."
    }
}
print (foxTrot(number: 2))


// Creating and looping through an array

let fourCandles = (name: "fourCandles", password: "C0rb3tt")
let ronnie = (name: "ronnie", password: "b@rk3r")
let fred = (name: "wilma", password: "b@m8@m")

let users = [fourCandles, ronnie, fred]

for user in users {
    print(user.name)
}
//a case can also be applied to a for loop to match specific criteria
for case ("fourCandles", "C0rb3tt") in users {
    print("fourCandles has the password \(password).")
}
//assigning the values to their individual constants
for case (let name, let password) in users {
    print("User \(name) has the password \(password)..")
}

//and more sucsinctly

for case let (name, password) in users {
    print("User \(name) has the password \(password)...")
}

//to filter on password and have a constant to manipulate
for case let (name, "b@m8@m") in users {
    print ("User \(name) has the password \"b@m8@m\"...." )
}