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Come back again in this exercise we're going to make an array of users.

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But we are going to make sure that our users are objects of a user's class.

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Essentially we're going to bring everything we learn so far into one place to produce an app that we

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can actually store some information about different users and we can also search between them.

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So the goal of the exercise is for you to be able to write an array of users that each user has a name

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a last name a height an icon an activity an active state and then you should be able to search for a

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specific user's let's say the last search that you want to do is this you want to search for a user's

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name.

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And if that user is within your database you want to get back their height.

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You know what is the height of a user called Adam or anything to that effect.

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So I give you a little time you get a certain on your own or you can pause the video at this point and

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once you're done you can have a look at my code as well.

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OK now I'm going to go into school and I'm going to get started with this project.

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I'm going to start a new project command line tools array of users and this is going to be in strafed

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array of those swift.

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And now they have that I'm really going to start with what we need to do.

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I'm going to write this a little different than what I would ideally do simply because I want to make

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sure that you understand the process in a real life exercise.

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You would immediately start adding new files in here but I'm not going to do that just yet.

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So I'm going to say I have a class called user doesn't have a superclass simply because our Strief doesn't

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have to have a superclass.

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And the information we need our name last name height eye color and active so last name a

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last name like that a string.

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I don't know why I do that.

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Hi Karlov and ask Steve which is a billion.

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Perfect.

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I know I need to have an initialiser.

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Some got a say in it and in my in it.

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I'm going to say here's something I want to show you which I don't particularly like to use but if you

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want it you could actually stick to the same naming convention so you could say name is Thring and last

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name the string and height which is again as an integer i Horler which is going to be a string and octave

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which is going to be active which is going to be a boolean value.

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Now two things to remember that usually when I call it like this I stacked my my arguments like this.

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So it's easier for me to see them and then since I'm using the same names just so that I'm not confused

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I'm going to say self that name is name.

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That's the name that you have received as an argument.

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I'm going to copy this five times and say self-taught last name is last name.

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Self-taught hide's is height self-taught.

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Eye color is eye color and so forth active is active.

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And since this is always you know you don't have to turn to self.

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Self is automatically being initialized and is being returned using this.

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Now this is of course if you choose to use exactly the same names.

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Like I said I don't particularly like that so I usually do something like this saying input's name so

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I know that's a name that has been entered and this is like input last name.

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So that's the last name that has been entered.

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Input Hyatt's That's the input value for the hide him.

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I color again eye color.

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And finally Im active you could choose to do whichever way that you want.

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One of the goals of this course is that you craft your own way of things so which other do you think

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is going to work for you.

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No they have the class user.

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I'm actually going to go in here what this entire class say command in or file new file.

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An odd new Swift class called user.

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And in my user class I have the foundation and this is my class so I have a new file for the class user.

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So this way I make sure that I modularize my code as much as I can then go back to the main.

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So in the main Now I can actually go ahead and add the new Our users are saying actually I could go

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ahead and say wow or let's call this one user of one is going to be users.

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And here are the information I have to enter.

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I'm going to say wow

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name is your last name is Jay height his hundred eighty eye color is pink.

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Why not some random thing and then active is true.

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So I've got one use added and since I'm not going to change this user I'm actually going to convert

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that into a lot to be a static value.

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Copy this and then I added two more times so the second time under the second one is saara let's say

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Alison.

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And the third one is Steve Adams has got a hundred sixty eight and he's got a hundred ninety is purple

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color for there are eyes on green.

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I'm one of them is actually not active So so far I've got three users made of the same class type use.

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And since you know this is free if I don't have to import our users simply because user is a member

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of the same target and he's already added that's here you see target's membership.

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It is a member in here.

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Now if you remember I said one of the goals of this exercise is to try and modularize everything as

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much as I can.

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So in order to do that I'm actually going to put everything into a function and that function I'm going

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to put it in a separate file.

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So to do that I'm going to say there is a function.

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This function is called populate to users.

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I'm actually going to return an array of users for me.

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So when we call this function it produces an array of users.

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How does it do that.

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It does it like this.

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Let me read in and everything.

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So the way it does it is this.

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It says Well there is a variable called the user's array which is going to be an array of users and

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it is initialized when you make each user.

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You say users array dot appends the dots at pens.

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And what what happened to it.

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I want to append the user one for instance.

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What is that.

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It's not the user's user.

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My bad.

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So I'm going to say use two.

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And of course use three.

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So I've got to use users being added in this function.

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And each of them are added to the user's array.

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And at the end of this function I'm going to say return users array.

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So whenever this function is called It will pull views so many users I will add them to my array.

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Let me quickly re write these so it's easier to see everything in one screen.

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So that's my function.

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It populates.

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And I'm still inside my main.

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So I'm actually going to put this inside the separate file and when I go in head and say give me all

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of this code that command and I'm going to call this populates.

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So they're going to be here.

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So there's a function called populate and that is a member of the same membership.

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So up until now I have the use of a class that is like that I have my populate a function that returns

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an array and I have my main.

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So the next thing we had to do was to be able to search within that I'm going to say let's go ahead

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and do this for user name and we're fine then right.

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That's the goal in here.

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So there are two ways I could do it.

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I could actually store our array inside a separate array here.

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Let's call it this array is populate the users essentially goes ahead and makes this array and put it

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inside this array.

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Or I could directly use this guy.

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I'm going to opt out for the second solution so I'm going to save for let's say any user of the type

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user even populates users array.

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So what does it mean.

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It says Go run this function.

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I know the result of it.

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The return of it is going to be an array of users which is essentially this line which is that one I'm

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going to say for any use in that category if any user name was.

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Well that my looking for.

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I'm looking for a mirror.

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If that was the case here is what you should do.

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You should say print a mare's nest height is what is his height his height is whatever you find in any

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user that type.

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So that's about that.

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That's how we get to do our search based on these teakwood our name.

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So let's go ahead and run this quote.

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And now it says as Heidi is one hundred and eight I should have left a little space in here.

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We could also put this whole thing inside a function.

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I could say function and that function is going to be search for a name a string and then it doesn't

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return or anything it just does this whole thing for us.

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So in the function I'm going to say search for name and then it's going to say for any user a string.

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I don't know why I constantly write that is strange and so I'm going to say for any use in blah blah

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blah if any user name is let's call this one search names so it's easier to understand if it is search

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name.

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Then it says search names.

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Hi it is that users Block.

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And then I could go ahead and say search for let's say this user.

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And if we print this now or if we compile and run this project now it says Amirs height is Waddler if

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this name was signed or I think we had a cyro right.

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Sounds like he's and ninety So that's about that.

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We managed to put our class inside a separate file with some valuables and attributes in it.

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We used all of those to populate an array and return it from a a function essentially and then we use

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that in our main.

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One thing that you probably have noticed if you are perceptive enough is this.

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Imagine I had a thousand users and the very first one was the server.

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Then in that very first iteration I would I found sorrow.

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And then from there are essentially basting my processing power because I'm going to run other 999 people

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even though I have already found the person I'm looking for.

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So in this statement I'm going to say break.

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So if we make sure that if we go through this entire operation whenever we find whether we want that

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for loop breaks so we don't come back here and we don't continue it anymore.

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That's about that.

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Another thing you could do is possible that my user does this says Saraa right.

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Then they make a mistake.

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They are not looking for a capital as you know titel case and nothing happens.

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So in that case I'm going to say you know what let's compare the lower case version of username with

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the lower case version of my search item because there are lot of cases of both of them are going to

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be identical.

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Right.

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So right now the lower case of some of the lurkers if anything.

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Now it says Sauers Hyde is that which is exactly what we would want.

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So let's keep it up to here and I'll move on to our next lesson.