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See the solution for the createTokens() method assignment.
JS Documentation
To read more about how to document your JS code, visit usejsdoc.org and devdocs.io/jsdoc.
Code Documentation Correction
The project files are correct, but there's a small error in what you see on screen.
The documentation for this method is missing the @param information. The complete documentation should look like this:
/**
* Creates token objects for player
* @param {integer} num - Number of token objects to be created
* @return {array} tokens - an array of new token objects
*/
Solution Code
Player class constructor method:
constructor(name, id, color, active = false) {
this.name = name;
this.id = id;
this.color = color;
this.active = active;
this.tokens = this.createTokens(21);
}
Player class createTokens() method:
/**
* Creates token objects for player
* @param {integer} num - Number of token objects to be created
* @return {array} tokens - an arary of new token objects
*/
createTokens(num) {
const tokens = [];
for (let i = 0; i < num; i++) {
let token = new Token(i, this);
tokens.push(token);
}
return tokens;
}
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Welcome back.
0:00
How did you feel about
writing this method?
0:01
Don't worry if you had any trouble,
the solution for
0:03
this method is up on screen and
I'm going to walk you through it now.
0:05
I'm inside my player.js file
where I wrote the method.
0:09
As you can see, just below my constructor
method, I created the method createTokens.
0:12
It accepts one parameter, num.
0:19
Num represents the number of
token objects to be created.
0:21
Inside the method I created
a variable called tokens
0:26
that's equal to an empty array.
0:30
This array will be populated in
the following lines of code,
0:33
with all of our new token objects,
and the array will then be returned.
0:37
After creating the empty array, I wrote
a for loop that will iterate num times.
0:41
Inside the for loop, I do two things,
0:48
first I create a variable called token and
set it equal to new Token object.
0:51
This is where the loop index and
0:56
the owning player object are passed
to the token's constructor method.
0:58
After that, I add the newly created token
to my tokens array using the push method.
1:03
When the loop is finished and
all the tokens have been created,
1:08
I return the array.
1:12
But where's it being returned to?
1:13
Part of your assignment for
1:16
this step was to call the create tokens
method from inside the constructor method.
1:18
By changing the tokens property to be set
to the return value from the method call.
1:22
If you jump up to the constructive method,
you can take a look at this.
1:27
As you can see I've set the token property
to the return value from the method call.
1:32
Note how when I call the create tokens
method, I'm using the this keyword.
1:38
Indicating that the method I want to call
is available on the object that we're
1:42
initializing.
1:46
I've also passed the number 21 as
an argument to the createTokens method.
1:47
21 might seem like an arbitrary number,
but
1:52
you'll see later when we write the code
that builds out the board and spaces,
1:55
that 21 is equal to half of
the number of spaces on the board.
2:00
Each player gets 21 tokens total.
2:04
So that the game board can
be completely filled without
2:06
having any tokens left over.
2:10
If you wanted you could make the game
more difficult by reducing the number of
2:11
tokens.
2:16
This would limit the number of
opportunities that a player had to
2:16
make a winning move.
2:20
Before you move on,
2:21
I would like to talk to you about
the commenting you see above my method.
2:22
This is a commonly used way
to document JavaScript code.
2:26
Every method in your classes
should be documented like this.
2:29
This way, anyone, including yourself if
it's been a while since you've worked
2:32
with a code base, can quickly figure out
what each method is responsible for.
2:36
The documentation should give
a quick summary of the method, and
2:40
then describe any arguments it receives,
and anything that's returned.
2:44
Check out the teacher's notes for a link
to a website that describes the syntax you
2:48
should use for
this documentation in detail.
2:53
Okay, take a moment to make any
necessary changes to your code so
2:55
that it matches the solution
you see on-screen.
2:59
And then head over to the next step, where
you will start building out the board.
3:02
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