Challenges

Remember the rules for this are

• Try to use only the information given up to this point in this book.
• Try not to give up until you've given it a solid attempt

Challenge 1.

Make your own implementation of a growable array that holds Strings and not ints.

Validate that .size, .add, .get, .set, etc. all work as you would expect.

Challenge 2.

Go back to your calorie tracker program from that project. Make use of a growable array of some kind to keep the full history of calorie amounts entered by the user.

Challenge 3.

When implementing the point of sale system project you may or may not have gone down the path of discovering growable arrays for yourself. Either way refactor that project to make use of a growable array to store the items ordered for the purpose of making a receipt.