Session8 Tasks

import Foundation
import Glibc
var code = ["a" : "b",
"b" : "c",
"c" : "d",
"d" : "e",
"e" : "f",
"f" : "g",
"g" : "h",
"h" : "i",
"i" : "j",
"j" : "k",
"k" : "l",
"l" : "m",
"m" : "n",
"n" : "o",
"o" : "p",
"p" : "q",
"q" : "r",
"r" : "s",
"s" : "t",
"t" : "u",
"u" : "v",
"v" : "w",
"w" : "x",
"x" : "y",
"y" : "z",
"z" : "a"]

//Task 1
func encode(dictionary: [String: String], message: String) -> String {
var encodeMessage = ""
     for char in message.characters {
     if char == " " {
        encodeMessage += "\(char)"
     } else {
         encodeMessage += (dictionary["\(char)"]!) 
     }
     
    }
return encodeMessage
}
print(encode(dictionary: code, message: "hello world"))
/*
var message = "hello world"
var encodedMessage = ""
for char in message.characters {
    var character = "\(char)"
    if let encodedChar = code[character] {
    // letter
        encodedMessage += encodedChar
    } else {
    // space
        encodedMessage += character
    }
}
print(encodedMessage)
*/

//Task 2
func decode(dictionary: [String: String], message: String) -> String {
var decodeMessage = ""
var decode: [String : String] = [:]

    for (key, value) in dictionary {
        decode[value] = key
    }
        for char in message.characters {
            if char == " " {
               decodeMessage += "\(char)"
            } else {
              decodeMessage += (decode["\(char)"]!) 
        }
     
    }
return decodeMessage
}
print(decode (dictionary: code, message: "uijt nfttbhf jt ibse up sfbe"))

/*
var encodedMessage = "uijt nfttbhf jt ibse up sfbe"
var decoder: [String:String] = [:]
// reverse the code
    for (key, value) in code {
        decoder[value] = key
    }
var decodedMessage = ""
    for char in encodedMessage.characters {
        var character = "\(char)"
        if let encodedChar = decoder[character] {
    // letter
           decodedMessage += encodedChar
    } else {
    // space
            decodedMessage += character
    }
}
print(decodedMessage)
*/

//Task 3
var people: [[String:String]] = [
[
"firstName": "Calvin",
"lastName": "Newton"
],
[
"firstName": "Garry",
"lastName": "Mckenzie"
],
[
"firstName": "Leah",
"lastName": "Rivera"
],
[
"firstName": "Sonja",
"lastName": "Moreno"
],
[
"firstName": "Noel",
"lastName": "Bowen"
]
]
func firstNames(_ nameOfPeople: [[String : String]]) -> [String] {
var firstNames: [String] = [] 
    for person in nameOfPeople {
        firstNames += [(person["firstName"]!)]
    }
return firstNames
}
print(firstNames(people))

//Task 4
func fullNames (_ nameOfPeople: [[String : String]]) -> [String] {
var fullNames : [String] = [] 
    for person in nameOfPeople {
        fullNames  += [person["firstName"]! + " " + person["lastName"]!]
       // fullNames.append((person["firstName"]!) + " " + (person["lastName"]!))
    }
return fullNames 
}
print(fullNames(people))