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      You have completed Practice Object Interaction!
      
    
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  Try out the `addPatron()` and `addBooks()` methods we wrote in this demo.
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                      Great work on creating the add book and
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                      add patron methods inside
the library class.
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                      In this video we're going
to test out these methods.
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                      We'll call them on our library object, and
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                      then use Chrome's dev tools to take a look
at how that library object has changed.
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                      You'll notice I attached another
work space to this video.
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                      This new one has
the completed add book and
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                      add patron methods added
to the library class.
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                      Open up the work space and
let's get started.
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                      I'm gonna head to my index.html file.
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                      The book, patron and library objects
we created previously are still there.
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                      We'll use these objects now.
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                      Since we already have a book
object created, we can try
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                      adding it to the library objects book
property using our new addBook method.
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                      So let's call the method
on our library object.
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                      Don't forget we have to pass in the book
object we're adding to the addBook method.
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                      Now let's log the library object to the
console to see if the book object is now
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                      in the book's array.
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                      Let's save and check out the console.
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                      Perfect.
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                      Our library object is here.
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                      Let's click this little
arrow to see what's inside.
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                      We can see the books and
patrons properties each on their own line.
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                      And it looks like the book object was
successfully added to the book's property.
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                      Let's click this arrow
to look more closely.
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                      Yep, we can see all the correct
data is here, that's great.
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                      Let's head back to the work space and
do the same with our add patron method.
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                      I'll call the method to add patron right
under the method call to add book.
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                      Now I'll save and preview again.
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                      Let's click into the library object.
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                      It looks like something has
populated the patrons property.
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                      If we dial down into it,
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                      we can see the patron object with
the correct properties and values.
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