All language subtitles for 005 More Initialization with Constructors_en

In the last section, we started talking about how we're going to begin adding different methods to

our deck and card classes will first begin with this first task up here.

So we want to have the ability to create a new deck and make sure that there are 50 to playing cards

inside of it.

Remember, a standard deck of cards has 52 cards for suits and 13 ranks, or however many 13 ranks.

Now, one thing I want to make really clear here is that even though I'm kind of indicating right here

that these are a bunch of methods that are going to exist on the deck, this make a deck function right

here?

Well, it's a little bit different than the other functions you see listed on here.

Let me tell you why.

I want you to imagine that at some point in the future, after we finish up this deck class and the

card class, we end up writing out our main function.

And then maybe inside this main function, you and I write some code to create a new instance of the

deck class.

So maybe we would write something like var deck is new deck.

Now, I don't know about you, but I would really expect that the instant I called New Deck right here,

I would just poof, magically get fifty two cards added for me to this card's property or this cards

field.

I would not want to have to run some additional method or additional function like, say, deck at all

cards or something like deck build my cards or something like that to generate those fifty two cards

and add them to this list.

In other words, I want to make sure that the instant I create a new deck, I automatically get 52 cards

added to this cards property.

So what I'm kind of driving out here.

Long story short, I think that we need to add a constructor function to the deck class.

So the instant we create a new instance of deck, we automatically get the opportunity to do some initialization

of our deck class and add those 52 cards in without having to require an extra function call like that

or any additional kind of hubbub to get this class initialized.

So I'm going to clean up this main function right here and then inside the declasse, I'm going to add

on my constructor function.

We just spoke about constructor functions a moment ago.

Remember to define one inside of a class.

We write out the exact name of the class as a function inside the class body.

So because my class name is Deck with a capital D. I'll add on a new function called Deck Place my parentheses

and then my curly braces like so.

So now this function right here is going to be called automatically every time we create a new instance

of a deck, which makes it a perfect location to create our big list of cards and add it to this cards

property right here.

OK, so let's take a quick pause right now.

We'll come back in the next video and start implementing the logic to add all of our cards to that cards

list.