Prof. Magdin Stoica @ProfM_OOP2
Joined January 2013-
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All marks will be posted by Wed. Midterm marks will be posted by tomorrow.
What kind of validation control structure makes the code simpler, easier to understand? (2/2)
What kind of validation control structure makes the code simpler, easier to understand? (1/2)
Latest version of the Drawing Studio program using abstract classes, abstract methods and interfaces: bitbucket.org/profmstoica/dr…
An interface is a contract between a service provider (e.g. button) and a client of the service (e.g. window class)
Generalization process: Concrete Thing => General Thing -> General Thing -> Abstract Thing --> (Any)thing #interfaces
You should not be able to created a Shape as you could ask the object to draw itself. A circle would be ok.
How to make shape objects comparable. Interfaces are the key.
Abstract classes cannot be instantiated. They are too... #abstract to exist as objects.
If you need to remove and insert elements often you will need a linked list collection.
An array associates an integer index with a value. A hash-map can associate a #key of any type with a value.
I wonder if this folks know we are talking about object-oriented programming and not actual horoscopes.
How would an OO horoscope look like that doesn't not store predictions in a multi-dim array?
Company directory as a multi-dimensional array: #not an OO solution. Has many limitations
Organizing predictions by zodiac signs using a two-dimensional array plus a single-dimensional array of counters
(1/2) To iterate through an array, to go through all its elements you can use a for loop.
A jagged arrays is called jagged because each of the array elements can have different dimensions.
If an array is box of variables of a given type. What is a multi-dimensional array? An array of "array variables".
The elements of an array must all be the same type. How do arrays of polymorphic objects work? Array of references.
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