static void Main(string[] args)
{
#region ArrayList
ArrayList aList = new ArrayList();
aList.Add("Bob");
aList.Add(46);
Console.WriteLine("Count: {0}", aList.Count);
Console.WriteLine("Capacity: {0}", aList.Capacity);
ArrayList aList2 = new ArrayList();
aList2.AddRange(new object[] { "Kerrin", "Mellisa", "Louise", "Paul" });
aList.AddRange(aList2);
aList2.Sort();
aList2.Reverse();
aList2.Insert(2, "Jim");
ArrayList range = aList2.GetRange(1, 3);
foreach (object o in range)
{
Console.WriteLine(o);
}
foreach (object o in aList)
{
Console.WriteLine(o);
}
//aList2.RemoveAt(1);
//aList2.RemoveRange(2, 3);
Console.WriteLine("Kerrin Index : {0}", aList2.IndexOf("Kerrin", 0));
// convert arralist into array
string[] myArray = (string[])aList2.ToArray(typeof(string));
string[] customers = { "One", "Two", "Three" };
ArrayList custArrayList = new ArrayList();
custArrayList.AddRange(customers);
foreach (string s in custArrayList
)
{
Console.WriteLine(s);
}
#endregion
Console.ReadLine();
}
static void Main(string[] args)
{
// Collections can resize unlike arrays
// #region provides a way to collapse
// long blocks of code
// ---------- ARRAYLISTS ----------
#region ArrayList Code
// ArrayLists are resizable arrays
// that can hold multiple data types
ArrayList aList = new ArrayList();
aList.Add("Bob");
aList.Add(40);
// Number of items in list
Console.WriteLine("ARRAYLIST\nCount: {0}",
aList.Count);
// The capacity automatically increases
// as items are added
Console.WriteLine("Capacity: {0}",
aList.Capacity);
ArrayList aList2 = new ArrayList();
// Add an object array
aList2.AddRange(new object[] { "Mike", "Sally", "Egg" });
// Add 1 array list to another
aList.AddRange(aList2);
// You can sort the list if the types
// are the same
aList2.Sort();
aList2.Reverse();
// Insert at the 2nd position
aList2.Insert(1, "Turkey");
// Get the 1st 2 items
ArrayList range = aList2.GetRange(0, 2);
/*
* // Remove the first item
* aList2.RemoveAt(0);
*
* // Remove the 1st 2 items
* aList2.RemoveRange(0, 2);
*/
// Search for a match starting at the provided
// index. You can also find the last index
// with LastIndexOf
Console.WriteLine("Turkey Index : {0}",
aList2.IndexOf("Turkey", 0));
// Cycle through the list
foreach (object o in range)
{
Console.WriteLine(o);
}
// Convert an ArrayList into a string array
string[] myArray = (string[])aList2.ToArray(typeof(string));
// Convert a string array into an ArrayList
string[] customers = { "Bob", "Sally", "Sue" };
ArrayList custArrayList = new ArrayList();
custArrayList.AddRange(customers);
#endregion
// ---------- DICTIONARIES ----------
#region Dictionary Code
// Dictionaries store key value pairs
// To create them define the data
// type for the key and the value
Dictionary <string, string> superheroes = new Dictionary <string, string>();
superheroes.Add("Clark Kent", "Superman");
superheroes.Add("Bruce Wayne", "Batman");
superheroes.Add("Barry West", "Flash");
// Remove a key / value
superheroes.Remove("Barry West");
// Number of keys
Console.WriteLine("\nDICTIONARY\nCount : {0}",
superheroes.Count);
// Check if a key is present
Console.WriteLine("Clark Kent : {0}",
superheroes.ContainsKey("Clark Kent"));
// Get the value for the key and store it
// in a string
superheroes.TryGetValue("Clark Kent", out string test);
Console.WriteLine($"Clark Kent : {test}");
// Cycle through key value pairs
foreach (KeyValuePair <string, string> item in superheroes)
{
Console.WriteLine("{0} : {1}",
item.Key,
item.Value);
}
// Clear a dictionary
superheroes.Clear();
#endregion
// ---------- QUEUES ----------
#region Queue Code
// Queue 1st in 1st Out Collection
// Create a Queue
Queue queue = new Queue();
// Add values
queue.Enqueue(1);
queue.Enqueue(2);
queue.Enqueue(3);
// Is item in queue
Console.WriteLine("\nQUEUES\n1 in Queue : {0}",
queue.Contains(1));
// Remove 1st item from queue
Console.WriteLine("Remove 1 : {0}",
queue.Dequeue());
// Look at 1st item but don't remove
Console.WriteLine("Peek 1 : {0}",
queue.Peek());
// Copy queue to array
object[] numArray = queue.ToArray();
// Print array
Console.WriteLine(string.Join(",", numArray));
// Print queue items
foreach (object o in queue)
{
Console.WriteLine($"Queue : {o}");
}
// Clear the queue
queue.Clear();
#endregion
// ---------- STACKS ----------
#region Queue Code
// Stack Last in 1st Out Collection
// Stacks are based on a stack of dishes that you wash in a restaurant
// Create a stack
Stack stack = new Stack();
// Put items on the stack
stack.Push(1);
stack.Push(2);
stack.Push(3);
// Get but don't remove item
Console.WriteLine("\nSTACKS\nPeek 1 : {0}",
stack.Peek());
// Remove item
Console.WriteLine("Pop 1 : {0}",
stack.Pop());
// Does item exist on stack
Console.WriteLine("Contain 1 : {0}",
stack.Contains(1));
// Copy stack to array
object[] numArray2 = stack.ToArray();
// Print array
Console.WriteLine(string.Join(",", numArray2));
// Print the stack
foreach (object o in stack)
{
Console.WriteLine($"Stack : {o}");
}
// Clear stack
#endregion
Console.ReadLine();
}
static void Main(string[] args)
{
ArrayList arr = new ArrayList();
int[] a = new int[] { 1, 3, 2, 6, 7, 4, 9, 10, 8, 5 };
arr.AddRange(a);
Console.WriteLine("Given Arary:");
foreach (int i in arr) {
Console.WriteLine("Values:" + i);
}
Console.WriteLine("\nCapacity: " + arr.Capacity);
Console.WriteLine("Count: " + arr.Count);
Console.WriteLine("IsfixedSize: " + arr.IsFixedSize);
Console.WriteLine("IsReadOnly: " + arr.IsReadOnly);
Console.WriteLine("\n");
Console.WriteLine("Inserted(1,6)");
arr.Insert(1, 6);
arr.Remove(3);
Console.WriteLine("Removed(3) Successfully worked ");
foreach(int i in arr)
{
Console.WriteLine("Values:" + i);
}
Console.WriteLine("\n");
arr.RemoveAt(5);
Console.WriteLine("RemovedAt(5) Successfully worked ");
foreach (int i in arr)
{
Console.WriteLine("Values:" + i);
}
Console.WriteLine("\n");
Console.WriteLine("Sort List");
arr.Sort();
foreach (int i in arr)
{
Console.WriteLine("Values:" + i);
}
Console.WriteLine();
Console.WriteLine("Contains(11): " + arr.Contains(11));
Console.WriteLine("GetRange(2,4): " + arr.GetRange(2, 4));
Console.WriteLine("IndexOf(9): " + arr.IndexOf(9));
Console.WriteLine("\nToArray() ");
arr.ToArray();
foreach (int i in arr)
{
Console.WriteLine("Values:" + i);
}
arr.Clear();
Console.WriteLine("Cleared Successfully");
Console.ReadKey();
}
