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So in this video, I'm going to be talking about the sectors and union and things saw.

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So this move is very important for the upcoming videos because will be creating the structures and pricing

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them to the arguments and also will be receiving a pointer to distract us and then we'll be moving over

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through this are the structures.

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So the structures are so similar to the classes, but these are like normal value types.

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So you can create a structure and it's a public structure.

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So test either structure and here we can have the structure members so that it's a public entirely and

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public in called public string name.

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So these three are the members and you you should not initialize these values in this structure.

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So this is like a blueprint for this structure.

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Now, what we're going to do is.

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We are going to create the object for this.

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So it's not really like object to a structure or transition.

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So let's test B so we can declare like this and we can also declare like this new test.

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Similar to degrading objects from the classes.

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Now how to access these members is using the date operator debug.

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So here you can see we have these blue colour members called ID and.

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So you can see called I.D. a name.

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So we can put into these also we can assign these by default.

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The values will be set to

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zero.

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So if I go and so.

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One, two, three, four.

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And I want to print this derogatorily.

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Let's go and print this and can see the value of I.D..

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So before initialization, we have this, uh, before assignment, we have this gyro, and after that

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we have one.

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And the next thing is we need to define the size.

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So you need to import this are and then go to drop services.

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And here we have martial or not size of.

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And here we need to parse the type of the data you want to get the size of.

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So I want to see a type of test.

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So I want to get the destructor things.

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So the integer takes four bytes and next integer takes four bytes and the string is a pointer, so it

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takes for weights further.

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Ruby provides.

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So if I go and print this.

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And here you can see those sizes for bites.

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Also the difference between the structure and union is the memory allocation will concede better rates

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and in the union the whatever has the maximum says.

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The whole union gets that same size.

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So in the sector we have this four bites and the four bites and the four bites of point.

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So we have this debate.

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So you can simply add them.

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And the size of the sector is simply additional these sizes.

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But in union, the maximum size, let's say if this is a double takes, it may take less.

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And the whole, uh, union gets the same, uh.

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Memory.

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Somewhere between union rhetoric.

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This video.

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And you can see this is identified the public you want.

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You can either declare a member as private.

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Private bring secret key.

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Now what happens is you cannot access the private members of this any structure.

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If I go and Peter.

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Secretary and European TV have no such section of the secret search warrant.

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But this.

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And.

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We got some address.

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So the security's inaccessible due to its production level.

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So what we need to do is we need to convert that to public order.

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We can also declare and their function that can set this value.

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So generally, uh, uh, this method uh like public acquired set.

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It's a secret, said secret.

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So these methods will be used to set the private members of this structure without knowing the value

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of this, without accessing this private member's.

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So this spring he began to secret keys to keep.

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So this mantra sets the value of this secret.

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And that's what we can write.

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Another matter that is public.

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Why get secret?

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And return secret key.

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So know how to set the security you need to use this function.

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Peter, set secret of you to buy this drink.

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So that's, uh.

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This is very secret key.

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And how to get the secret key using the dark secret.

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Okay.

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Sorry, sorry.

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The string is written down.

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So if you run this and here again, see, we got the contents of this secret to keep.

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And another way is using the catterson in.

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So this is a these are like the properties of this member.

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So what we can do is we can simply do it.

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These are two functions.

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I'm going to say a public.

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That's a secret.

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And I want to say get.

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Return secret key.

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And I can also say set and secret keys equals to you.

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So it's good.

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And so we got some errors.

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Now what I can do is build this.

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So whenever I set out secret.

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Easy calls to read.

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Say hello.

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Well.

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And now I can just print this this secret.

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So whenever we are assigning a value, the value will be assigned to this secret key.

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Whenever we are going to print this, the value will be automatically returned.

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So let's turn this.

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And here we can see the string.

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So you can access the secret that is simply not a member, but it will perform the operations on this

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private member.

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Secret key.

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And you can also create a constructors for this.

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So the constructor will automatically invoke whenever the object is created.

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But the drawback of this constructor initiative is all of these values.

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You need to have one constructor that initializes all of these member values.

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They get the object.

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So it's for this activity.

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I think it's you use only constructor and you have the new.

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And also I want to discuss this earlier.

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That is real.

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Hopefully they'll kind it out.

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And here you can see there are three kinds Expedia, sequential and auto.

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So it is exquisite.

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You use it for the unions and sequential use for sectors.

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So the sequential run over the sector will be exactly as it is.

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Very opposite this structure in some other function.

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So the members of this functions of the structure will be exactly in the order.

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So the first one will be idea, and second and third one will be the secret key.

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So there's this one get interchanged when you put this real control sequential.

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Now it's different.

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And I've got a union.

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For this.

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They are.

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Priorities explicit.

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You don't require any union keyword, the same struct you wrote to use it for, uh, union so that my

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union.

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And now we need to it to our.

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The girl to where it was.

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Public.

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In.

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Rule number.

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And really we need to declare a field offset of the offset where this variable starts.

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So if I said zero, then this would be the starting position sort of to declare another variable in.

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Agreed.

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And let me read to.

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Veered off set of zero.

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So the thing is, both start at the same location, same opposite.

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So that means if you assign any value to this or in a model and if you build up this grade, then this

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value will be printed because they share both the memory location and at the same offset.

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So that create the.

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So the name is my union.

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Okay, so.

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My union and musical store knew my union.

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And so saying that raw numbers equals to that fight.

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Now let's go and put this in the raw number.

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We're just pretending it's where you know.

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And here you can see the fight.

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Now let's go and turn this to grade.

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Now here you can see we got the same value because the the memory allocated is the same the four bytes.

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That's also

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the value of.

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The size.

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And we can see we got only four words for that to reduce.

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No, let me go and change this field out to four.

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So if you started the four so program that my union pressed for.

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And if I go and assign a different number to the grade and also print the wrong number as well the number.

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So we'll be seeing different values for these two variables.

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Because of, uh, because of eight bytes, you can see the file, which is the value of row number and

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the grade is under.

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And the size of this union is gigabytes.

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So this is about the basic societies and unions.

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We're also seeing the national sectors now.

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So we can also include this union in my centre.

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So all I need to do is I can say public.

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So that type of this variable I want to create, that is of the day my union.

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My union that I'm on.

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I am to.

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Now, let me comment on this.

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Now when I created this tea, I can simply access the members of this union by using be dot young to

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dot this member.

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B .2.0 number is equal to 69.

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And let's go and put in this beta, a computer or a number.

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Let's go and run this and you can see the values X and also let's print out the whole size.

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So we are printing the size of this.

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So down for whites.

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For whites and this is for.

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And this should be it, I guess.

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So total will be 20.

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So we got these 20 points and it's.

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Jane this.

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And now we get only 16.

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So this is all about the cities and unions in this region.