Difference between revisions of "OOP Class12"
Line 130: | Line 130: | ||
browser http://iam.colum.edu/oop/browser/browser.aspx?f=/classsource/ConsoleApplicationCharacters/ConsoleApplicationCharacters/ConsoleApplicationCharacters | browser http://iam.colum.edu/oop/browser/browser.aspx?f=/classsource/ConsoleApplicationCharacters/ConsoleApplicationCharacters/ConsoleApplicationCharacters | ||
+ | |||
+ | ===Weapons=== | ||
[[image:CharactersStrategy.PNG|700px]] | [[image:CharactersStrategy.PNG|700px]] | ||
+ | ===Characters=== | ||
+ | |||
+ | [[File:CharacterStrategy.PNG|700px]] | ||
==Use Case== | ==Use Case== | ||
Revision as of 21:06, 13 April 2016
Contents
Interfaces Part2
There are many interfaces in the .net framework. Some that we have been working with are the [ICollection https://msdn.microsoft.com/en-us/library/system.collections.icollection(v=vs.110).aspx] [IList https://msdn.microsoft.com/en-us/library/system.collections.ilist(v=vs.110).aspx] and [IEnumerable https://msdn.microsoft.com/en-us/library/system.collections.ienumerable(v=vs.110).aspx]
These interfaces allow us to use methods in a List and Array.
Here is an example of sorting a list of ints or an int[]
int[] ints = new int[] { 5, 4, 2, 3, 1 };
foreach (var number in ints)
{
Console.Write(string.Format("{0}\t", number));
}
Console.WriteLine();
Array.Sort(ints);
foreach (var number in ints)
{
Console.Write(string.Format("{0}\t", number));
}
Console.WriteLine();
ints = ints.Reverse().ToArray();
foreach (var number in ints)
{
Console.Write(string.Format("{0}\t", number));
}
Console.WriteLine();
//mess it up again
ints = new int[] { 5, 4, 2, 3, 1 };
ints = ints.OrderBy(i => i).ToArray();
foreach (var number in ints)
{
Console.Write(string.Format("{0}\t", number));
}
Console.WriteLine();
//mess it up again
ints = new int[] { 5, 4, 2, 3, 1 };
//last way slightly uses agregate function to Order array by int, turns array into list so we can call foreach
ints.OrderBy(i => i).ToList().ForEach(ii=>Console.Write(string.Format("{0}\t", ii)));
Console.WriteLine();
now with List
Now lets sort some dogs
class Dog : IComparable
{
public string Name;
protected int age;
public int Age { get { return age; } set { age = value; } }
public int Weight;
public string BarkSound;
public Dog()
{
this.Name = "fido";
this.BarkSound = "woof!";
this.Weight = 1;
}
public string About()
{
return string.Format("Hello my name is {0}. I'm {1} years old. I weigh {2} lbs", this.Name, this.Age, this.Weight);
}
public int CompareTo(object obj)
{
if (obj is Dog)
{
if (this.Age > ((Dog)obj).Age) return 1;
}
return 0;
}
}
and finally override some operators
public static int Compare(Dog left, Dog right)
{
if (object.ReferenceEquals(left, right))
{
return 0;
}
if (object.ReferenceEquals(left, null))
{
return -1;
}
return left.CompareTo(right);
}
public static bool operator <(Dog left, Dog right)
{
return (Compare(left, right) < 0);
}
public static bool operator >(Dog left, Dog right)
{
return (Compare(left, right) > 0);
}
Strategy Pattern
Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from clients that use it.
http://www.dofactory.com/Patterns/PatternStrategy.aspx
Create Characters class and weapons class that uses the strategy pattern
http://iam.colum.edu/oop/classsource/ConsoleApplicationCharacters.zip
Weapons
Characters
Use Case
http://en.wikipedia.org/wiki/Use_case
Diagrams
http://en.wikipedia.org/wiki/Use_case_diagram
Windows Course App Use Case
Actors
- particiant outside of the system
Activity
- something an actor does
Version 1 breif use case
Actor Admin Course #Add a course to the system #Delete a course to the system Student #Add a student to the system #Delete a student to the system #Student add a course #Student remove a course
Home work
Toastable project in moodle
Make one of your classes sortable by implementing IComparable