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php file
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The objective is to implement a simple class for a shopping cart.
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The objective is to allow users of the ShoppingCart class, to access the content in an array-like fashion. The next objective is to allow for foreach iteration.
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The objective is to provide a user of the ShoppingCart class with the ability to save the class content into JSON and string. We would also like to make it easily extensible in the future.
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The objective is to monitor how many times has been a given function called.