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So well come back again.

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This lesson isn't an actual programming lesson is rather more of an administration work something that

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we have to do to our code to make sure it is more readable both for us.

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Or if someone else is going to work on the same project as us so and that is partitioning our code or

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what we call arising or code.

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Let me go ahead and to exclude then show you what they mean.

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I already have something wrong.

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One hundred forty five lines of code in my view controller class and that's really another good thing

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because you have so much data and it's very difficult to find different things.

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So for us to make sure that things are more readable for us in the future or somebody else we're going

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to go ahead and partition the code into so many different files.

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And we do that by using a very specific feature of swift current extensions.

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Now here is how we use an extension.

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I'm going to go ahead and add in your file that you can do it with file new file.

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I'm going to add a new Swift file this swift file.

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We call it whatever you want.

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What is a very good practice and a very good tradition to call it by the name of the class you are trying

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to extend and the function you're trying to add.

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So for instance I'm going to go ahead and say This is called The View Controller plus timer function.

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So I identified that it's called The View Controller Plus the function of time.

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And when I create that and then when I get in here I need to do a few things I need to import.

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I quit because that's the one I need for my my class or my extension then I'm going to say this is an

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extension to view controller and that's all you have to do.

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You now have a new extension that you can use for whatever that you know you have a part of the code

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from view controller of.

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So I could for instance go to View Controller say give me the timer function call it entirely pasted

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in here and this will work as if it was in the body of the view controller itself.

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So with that I'm going to go ahead and do the same thing for almost everyone in here.

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I'm going to go ahead and say it make copies on the stuff so my life becomes a little bit easier.

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So I'm going to copy that little part.

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Say I have a view controller.

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Plus you read the law.

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So that's the function of the view that load.

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So obviously we can add any kind of function.

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So let me go ahead and do this one other time we're going to say give me this one view that lot put

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it there.

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So that's that then in my view control in the cloud that they had I have to randomize.

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So let's go ahead and say command and noosphere file.

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This is view controller across the randomise and in the months I'm going to rewrite everything to that

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it's kind of a reminder for all of us extension to view controller within that I have the randomise

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function.

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So when I cut this by its entirety take it to the randomise.

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So that's it.

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And then I have a function called to make tiles let me copy some part of my code so my life is a little

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bit easier.

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Let me actually see what else I need so I do all of them in one go.

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I need to reset action game mode action and it make tiles at least for now.

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So I'm going to go ahead and say This is called the Wii U controller.

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Plus I'm going to call people that say make titles.

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So that's one file that I need then I need to reset and game more.

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So I'm going to say Give me another one.

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So the same name as before plus reset that one is it.

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And then I'm going to get another one.

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Say that same name plus game mode.

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So now I have all of these Namik copies some more stuff but I have to copy that little bit on the top.

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Everybody gets to be a kid.

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You can sort of extension copy that to everyone and take a moment to reset and to make tiles.

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And then I'm going to go out of your control take the reset I can put it in the Reset.

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So if we haven't already done this now.

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Now it's a lot cooler and easier for it.

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There are many advantages to it is a lot cleaner is easier to hand this over to a colleague or someone

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who works with you.

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Also for me when I'm teaching it's a lot easier to show you things that are only in this one file and

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they all fit within one screen.

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So there's a lot of advantages of doing that and I really recommend you guys doing it so that you can

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turn when I caught the game more action put it in the game mode.

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Again this is the function we haven't done but if you'll be doing it hopefully sometime soon in the

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next few lessons.

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And let's go ahead and see what else we have we have the game.

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Make tiles this function make toys.

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Already it is quite long and I personally don't like very long functions and nobody in the programming

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world makes it so.

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Down down the end of the course when we talk about the advanced topics.

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I'm actually going to change these when I break it into several pieces so it's easier to read essentially.

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So now my view controller only has a declaration of variables and that is something you cannot put in

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a separate extension.

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They must be here in the body of the controller class.

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But then I have the resets I have the game.

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I have to make tiles which is a state a long record.

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I have to randomize which is very nice and tidy and clean.

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I have the timer function which is perfect and I have the view that law that calls a few things for

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me and it still is quite tidy and clean and easy to read.

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So that's all I wanted to do in this list.

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And like I said no new programming just adding new stuff into a group of differing class extensions.

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So they're going to help us categorize politician or more problematic term of modularize.

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Our code is keep it up to here and we'll move on to our next lesson.