1
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Now have you learned about private and public.

2
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I also want to turn name into a private property.

3
00:00:07,870 --> 00:00:12,740
And now here we have a little bit of not really an issue but a little bit of inconvenience.

4
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We have that name field here.

5
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Then we get a value for it here in the constructor and then we stored that value for that field here

6
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in the constructor in the field.

7
00:00:21,970 --> 00:00:25,540
We can do that and it's certainly very clear what we're doing here.

8
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But in a lot of use cases you'll have a lot of classes where all the properties you have all the fields

9
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you have are initialized in the constructor and therefore often you might find yourself writing a couple

10
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of properties a couple of fields like this at the top.

11
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No matter if they're private or public.

12
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And then you just repeat all of that down there in the constructor just to then initialize these values

13
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here in the constructor function.

14
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You don't have to do that.

15
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Instead of doing this double initialization code here you can get rid of your field definitions up there

16
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and now you see you would get an error but you can always get rid of this year and instead now simply

17
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add the Axis modifier in front of the parameter.

18
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So if it should be public at public let's say for the name we keep it public.

19
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Now if it should be private at private.

20
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Here you have to add public because this now is an explicit instruction for typescript that tells typescript

21
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that you want to not just get these arguments here in the constructor but that you want to create properties

22
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for this class with the exact same names and therefore here we should also rename n to name.

23
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So did a name property is created on the create a class.

24
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So this is simply a shortcut for this double initialization code here where you had to find your fields

25
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and then stored the value.

26
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Now we're doing it all in one go.

27
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We defined which arguments to constructor takes and then for every argument which has such a access

28
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modifier in front of it a property of the same name is created and the value for the argument is stored

29
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in that created property.

30
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So now we just have to fix our department creation here and add an idea because I added this new argument.

31
00:02:20,900 --> 00:02:27,170
And now what you'll see is that that when we call describe down there and I do actually output the idea

32
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there as well.

33
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Maybe by changing this department to use a string literal here the part meant this dot idea.

34
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And then here this dot name you will see that this all still works.

35
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It compiles without errors here and here we get the output with our I.D. and with our name because of

36
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that little shortcut we also say if some code for all of that.