- Explanation: Revisiting the checkOut() and returnBook() Methods 1:42
- Solution: checkOut() and returnBook() Methods
- Explanation: A Better Way With Setters Methods 1:32
- Recap: A Better Way With Setter Methods
- Solution: A Better Way With Setter Methods
- Demo: Checking Out and Returning a Book 2:07
- Explanation: Charging Fines to Patrons 0:40
- Recap: Charging Fines to Patrons
- Solution: Charging Fines to Patrons
- Demo: Charging Fines to Patrons 2:34
- Checking Out and Returning a Book 3 questions
Preview
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Explanation: A Better Way With Setters Methods
1:32We've written the `checkOut()` and `returnBook()` methods, but we have an opportunity to take advantage of JavaScript's "setter" methods and should refactor our code.
How was that challenge?
0:00
We're getting pretty far
into our library app.
0:02
You just finished adding the check out and
return book methods to the patron class.
0:04
You calculated and set the due
date inside the check out method.
0:08
But there's another way this could
be accomplished that I prefer.
0:12
Consider this.
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There's a property on the book
class called out, and
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it holds a Boolean value, true or false.
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The book either is or isn't checked out.
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The book has a due date property.
0:25
These two properties are set manually in
the checkout method on the patron class.
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But wouldn't it be great if when
a book object is marked out,
0:32
that it would trigger the due date
to be calculated and set as well.
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And of course,
when the book is marked back in,
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it would trigger the dueDate
property to be changed back to null.
0:41
That is the beauty of setter methods.
0:45
Marking a book as out or in and
calculating and setting a due date inside
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both the checkOut and return book methods
is a bulky way to go about these tasks.
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If we had a setter method for the out
property, we could also figure out the due
0:58
date, and set or unset the due
date property at the same time.
1:02
Meaning our check out and return book
methods would become a lot more concise.
1:06
Let's refactor our code a little
bit to try this new approach.
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Open up the attached workspace for
an updated readme or
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check out the teacher's notes for
the new instructions.
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The following step provides a text based
explanation of what we've discussed in
1:20
this video and might offer some more
insight if you're feeling confused.
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Give the coding a try and then check out
the solution before joining me again.
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