Sandra L Course Part 4 (lectures 23 to 29)

Well, what a busy time it has been - hence the lack of entries! Not going to go into detail; I just want to crack back on with my work! I have missed it and am not going to recap anything at all, just continue with where I got to. So far, Sandra's course has been easy but useful for some consolidation. I'm sure it will get harder soon!

Start Time - 19:15

If/else statements

If statements - that all seems pretty logical so far.

let temp = 20
let sun = "Sunny!"
let clouds = "Cloudy!"

if temp >= 20 {
    print(sun)
} else {
    print(clouds)

}

Another example - 

if temp >= 20 {
    print(sun)
} else if temp > 10 {
    print(clouds)
} else {
    print("Awful weather!")
}

They key thing here is that the if/else block is followed in order. If more than one statement is true - like in the one above (temp being treater than/equal to 20 as well as greater than 10) then the top line is executed as it does it in order. 


Switch statements

No need to go through in any more detail!

Structures

Oh here's a cool feature - 

var name = "david mitchell"

name.capitalized


So using the 'capitalized' property means that "David Mitchell" is returned!

Classes


class Person {
    
    var name: String
    var age: Int
    
    init(name: String, age: Int) {
        self.name = name
        self.age = age
    }
}

Enumerations

Weather forecast example - creating an enum, then a switch statement within a function. 


There's more to this but to be honest, I just wanted to skim through. At some point, I may revisit the steps to create code that combines so many elements of Swift. For now, it was just good to see how that can happen and it is worth bearing in mind for the next Xcode project that I work on. 

Finish Time - 19:55 (40 minutes total)

So there we go, that's the end of Chapter/section 4. Next time, tomorrow morning, it will be chapter 5! I will really make an effort to code along this time and try out different things, then make my own version of the code so I can actually learn more!


Comments

Post a Comment

Popular posts from this blog

*Xcode Project Entry 2* F1 Quiz - part 1

Image
It's Christmas Eve and time to code! To think, a year ago, I was plodding along with some eBook, blindly convincing myself that I was on a steady road to coding greatness. Really, it was from June where I made the decision to start again, humbling as that may seem. It would have been comforting to have completed endless 'beginner' courses but branching out and applying the theory is the key thing, which brings us to this entry. Yes, my second Xcode OWN project! I thought about doing an educational one, as there is certainly a lot of scope and relevance for that, being a teacher and all. However, making a quiz makes sense, for various reasons.  First off, I have made this before through Angela's excellent tutorial. No offence to Sandra, but hers is not even close to the elegance and effectiveness of Angela's project. The one thing to take from Sandra is the stack views. Definitely something I will use from now on. This is one of the great things about learning from...
Read more

Angela Yu Course Part 10 (up to lesson 112)

Image
It's unlikely that I'll be able to do any Swift tomorrow as I'm going to Eastbourne today, for the weekend. So I can give half an hour now, maximum! Coding Challenge - Destini App! Choose your own adventure books! I used to ADORE these. Angela explains that these have had some sort of revival through the Lifeline games. It's very binary - yes/no mostly. I have my own experience of this based on WDC... Now the challenge is to complete the game! Having followed the first few instructions, which I found a bit confusing it must be said, I was about to surrender and see the answer. Then I managed to stop myself - I CAN do this, or at least have a good go! Even if I don't get the correct answer, it will be good practice to put what I know into practice. This is my weakness, which I keep coming back to - that when some problem solving is required, I fold far too quickly. So here is what I need to do: Let's break this down... I need to use the...
Read more

Angela Yu Xcode 12 Course - Part 7 (lectures 74 to 79)

Image
No time to waste! Only got a short amount of time now so going to get a few minutes or so in! Start Time - 20:14 Conditionals If statement for 'love calculator' example. So a simple example for this. The idea will be that conditionals are used to show that the print statement will do it differently for whatever the number is. With updated Swift, I would use the Int.random(0...100). Easy fix that would be. Also no UIInt32 needed but just an Int. So with the if statements, it would be a STRING being returned.   Linked to the whole choose your own adventure - if/else for each choice. BMI Challenge No need to do this - easy enough to be honest. Just skimming through. BODMAS principles... So something I picked up on before is not needing the greater than AND less than value for the middle line (for the else if bmi > 18.5) A better solution, which Angela is already explaining before I could say it is returning a string instead of a Double. So the...
Read more