Description

Extra Credit – if you want more to do, add these methods to the OurArrayList class (no need to send to me) these are all methods in the IList<T> interface that List<T> inherits from.

1. The Contains method is used to test for the presence of an item in the list, true if item is found in the OurArrayList; otherwise, false
2. The Insert method is used to insert a new item in the middle of the list at the index provided (not greater then Count), shifting everything over, If index == Count, the item is added at the end of the list. If this insert brings Count to the capacity of the array a new array needs to be allocated and all the items copied over (like in the add method). Remember to adjust Count if needed.
3. The Remove method is used to remove the first occurrence of a specific item from the OurArrayList, The method should return a boolean, true if item is successfully removed; otherwise, false. This method also returns false if item was not found in the List. Keep in mind the need to shift the data into the slot where the item is removed from and the Count adjusted.
4. The IndexOf method is used to Determine the index of a specific item in the OurArrayList. Return the index of item if found in the list; otherwise, -1.
5. The TrimExcess method, this is the method a few of you were looking for it is part of the List<T>class (not the IList<T> interface).
The documentation describes it as such. It sets the capacity (the size of the array) to the actual number of elements in the List (the Count). “This method can be used to minimize a collection’s memory overhead if no new elements will be added to the collection. The cost of reallocating and copying a large List<T> can be considerable, however, so the TrimExcess method does nothing if the list is at more than 90 percent of capacity. This avoids incurring a large reallocation cost for a relatively small gain.”

If you are still bored, Google how to overload the operator +, in our Shapes.Square class.
Meaning add to the Square class the ability to add 2 Squares together and the resulting Square will have the length of both Squares combined. You should be able to write this code after you are done:
Square s1 = new Square(10);
Square s2 = new Square(20); Square s3 = s1 + s2; s3.length == 30
Still bored……
Write or use a person class that has an age in it and overload the ++operator
(incrementer) and –operator (decrementer) to increment or decrement the person’s age.
You should be able to write this code after you are done:
Person p = new Person; p.Age = 20;
p++;
p.Age == 21 p–;
p.Age == 20;