public void WorkingWithArrayList()
{
//the members of any type in System.Collections are designed to work with type 'Object'
//hence even if you insert a value type in these collections a performance hit is encountered due to boxing
//to top it all its not type safe, i can insert anything in the below ArrayList
//the only option left in this case is to create a custom type-safe collection class
arrList.Add(10); arrList.Add(20); arrList.Add(30); //arrList.Add(40.34);
foreach (Int32 item in arrList)
{
Console.Write(item + " ");
}
Employee emp1 = new Employee(48090, "naynish", 85000);
Employee emp2 = new Employee(48091, "purab", 65000);
Employee emp3 = new Employee(48092, "jay", 75000);
//not inserted in the Hash Table
Employee emp4 = new Employee(48093, "tripti", 60000);
//Add these Employee objects to the custom collection
EmployeeObjectCollection collection = new EmployeeObjectCollection();
collection.Add(emp1); collection.Add(emp2); collection.Add(emp3);
int key = 48095;
if (collection.GetValue(key).Id != 0)
{
Console.WriteLine(collection.GetValue(key));
}
else
{
Console.WriteLine("\nEmployee {0} does not exist in the Hash Table", key);
Console.WriteLine("please view the below hash table entries and enter the correct key");
foreach (DictionaryEntry item in collection)
{
Console.WriteLine((Employee)item.Value);
}
}
}
public Employee GetValue(int e)
{
Employee temp = new Employee();
if (htEmployee.ContainsKey(e))
{
foreach (DictionaryEntry item in htEmployee)
{
if (e.ToString() == item.Key.ToString())
{
temp = (Employee)item.Value;
}
}
}
return temp;
}
public void Remove(Employee e)
{
htEmployee.Remove(e.Id);
}
//now my Add is prototyped to accept only Employee objects
//if you try to pass in any other type then you will receive a compile time error
public void Add(Employee e)
{
htEmployee.Add(e.Id, e);
}
public void WorkingWithStack()
{
Console.WriteLine("\nstack implementation");
Stack s = new Stack();
Employee emp1 = new Employee(90, "hello world!", 45000);
Employee emp2 = new Employee(91, "test data", 90000);
Employee emp3 = new Employee(92, "android", 95000);
s.Push(emp1); s.Push(emp2); s.Push(emp3);
s.Pop();
foreach (Employee item in s)
{
Console.WriteLine(item);
}
}
public void WorkingWithSortedList()
{
Console.WriteLine("\nsorted list implementation");
SortedList s = new SortedList();
Employee emp1 = new Employee(90, "hello world!", 45000);
Employee emp2 = new Employee(91, "test data", 90000);
Employee emp3 = new Employee(92, "android", 95000);
s.Add(emp1.Id, emp1); s.Add(emp2.Id, emp2); s.Add(emp3.Id, emp3);
s.Remove(emp2.Id);
foreach (DictionaryEntry item in s)
{
Console.WriteLine("key {0}, value {1}", item.Key, item.Value);
}
}
public void WorkingWithQueue()
{
Console.WriteLine("\nqueue implementation");
Queue q1 = new Queue();
Employee emp1 = new Employee(90, "hello world!", 45000);
Employee emp2 = new Employee(91, "test data", 90000);
Employee emp3 = new Employee(92, "android", 95000);
q1.Enqueue(emp1); q1.Enqueue(emp2); q1.Enqueue(emp3);
q1.Dequeue();
Console.WriteLine("Queue element count {0}",q1.Count);
foreach (Employee item in q1)
{
Console.WriteLine(item);
}
}
