static void Main(string[] args)
{
//ArrayList
ArrayList al = new ArrayList();
int a = 101;
al.Add(a);
al.Add("This is a arraylist");
al.Add(2.3f);
al.Insert(3, "This is the forth index");
ArrayList al2 = new ArrayList();
al2.Add(102);
al.InsertRange(1, al2);
Console.WriteLine("ArrayList:");
Console.WriteLine();
foreach (var ele in al)
{
Console.WriteLine(ele + " ");
}
Console.WriteLine("The count of the arraylist is {0}", al.Count);
Console.WriteLine("The capacity of the arraylist is {0}", al.Capacity);
Console.WriteLine();
// Hash table
Hashtable ht = new Hashtable();
ht.Add(1, "one");
ht.Add(2, "two");
ht.Add(0.3f, 2);
ht.Add(4, null);
ht.Add("Hema", "vathi");
ht.Remove(2);
// ht.Clear();
Console.WriteLine("Hashtable:");
Console.WriteLine();
foreach (DictionaryEntry ele in ht) //ht.keys means only print a key values for values the viceversa is applied.
{
Console.WriteLine("{0},{1}", ele.Key, ele.Value);
}
String firstelement = (string)ht[1];
String str = (string)ht["Hema"];
Console.WriteLine("The first element in the hashtable is {0}", firstelement);
Console.WriteLine("The last element in the hashtable is {0}", str);
Console.WriteLine("The hash table contains a 0.3 is {0}", ht.Contains(0.3f));
Console.WriteLine();
//SortedList
Console.WriteLine("Sorted List:");
SortedList sl = new SortedList();
sl.Add(2, "two");
sl.Add(1, "one");
sl.Add(0, "zero");
sl.RemoveAt(0);
foreach (DictionaryEntry i in sl)
{
Console.WriteLine("{0},{1}", i.Key, i.Value);
}
Console.WriteLine();
//stack
Console.WriteLine("Stack:");
Stack s = new Stack();
s.Push("hello");
s.Push(102);
s.Push(102);
s.Push(.3f);
foreach (var item in s)
{
Console.WriteLine(item);
}
Console.WriteLine("The first element will be deleted is {0} ", s.Peek());
Console.WriteLine();
//Queue
Console.WriteLine("Queue:");
Queue q = new Queue();
q.Enqueue(34);
q.Enqueue("thirtyfour");
q.Enqueue(3.4);
q.Dequeue();
foreach (var item in q)
{
Console.WriteLine(item);
}
Console.WriteLine("The first element of the queue is {0}", q.Peek());
}
static void Main(string[] args)
{
//ArrayLists
ArrayList numbers = new ArrayList();
numbers.Add(5);
numbers.Insert(0, 9); //inserts a value at the index marked
numbers.Remove(5); //removes first instance of the value
numbers.RemoveAt(0); //removes the index supplied
//Can add all data types within arraylists even if it causes errors
//numbers.Add("Hello");
foreach (int i in numbers)
{
Console.WriteLine(i);
}
Console.WriteLine($"There are currently {numbers.Count} elements in the arraylist.");
//create array list
//add 5-10 numbers
//create a result variable
//use a foreach loop to add them all together into the result variable
//display the result in the console
ArrayList values = new ArrayList();
values.Add(1);
values.Add(2);
values.Add(3);
values.Add(4);
values.Add(5);
int result = 0;
foreach (int i in values)
{
result += i;
}
Console.WriteLine($"The values added together is {result}");
Console.WriteLine();
//Hashtables
Hashtable ht = new Hashtable();
ht.Add("001", "John");
ht.Add("002", "Paul");
//Can add all datatypes even if it causes an error
//ht.Add(2, true);
Console.WriteLine(ht["001"]);
Console.WriteLine();
//Lists
//blank list
//List<int> numList = new List<int>();
//adding multiple objects when creating a list
List <int> numList = new List <int>
{
1,
2,
3,
4
};
numList.Add(5);
numList.Insert(0, 9);
//numList.Remove(5);
//numList.RemoveAt(0);
foreach (int i in numList)
{
Console.WriteLine(i);
}
Console.WriteLine($"There are {numList.Count} elements in the List");
numList[0] = 1;//can access any index like you would with an array
int numResult = numList[0];
Console.WriteLine();
//Dictionary
Dictionary <string, bool> tasty = new Dictionary <string, bool>();
tasty.Add("Chicken Curry", true);
tasty.Add("Asparagus", false);
Console.WriteLine(tasty["Chicken Curry"]);
Console.WriteLine(tasty["Asparagus"]);
//How to use user input to get value
Console.WriteLine("Which food would you like to check?");
string input = Console.ReadLine();
bool resultTasty = tasty[input];
Console.WriteLine(resultTasty);
bool foodTest;
if (tasty.TryGetValue("Doritos", out foodTest))
{
Console.WriteLine($"Could find key. Here is value: {foodTest} ");
}
else
{
Console.WriteLine("Could not find key");
}
//how to loop through dictionary
foreach (KeyValuePair <string, bool> kvp in tasty)
{
//How to access key and value in foreach
//Console.WriteLine(kvp.Key);
//Console.WriteLine(kvp.Value);
if (kvp.Value == true)
{
Console.WriteLine($"{kvp.Key} is tasty!");
}
else
{
Console.WriteLine($"{kvp.Key} is icky!");
}
}
}
static void Main(string[] args)
{
// Array List //
ArrayList list = new ArrayList();
Course c1 = new Course();
Course c2 = new Course();
Course c3 = new Course();
list.Add(c1);
list.Insert(1, c2);
int i = list.IndexOf(c1);
// Console.WriteLine("Index of c1 is :"+i);
int j = list.IndexOf(c2);
// Console.WriteLine("Index of c2 is :" + j);
bool a = list.Contains(c1);
// Console.WriteLine("c1 is contain in this list "+a);
bool b = list.Contains(c3);
// Console.WriteLine("c3 is contain in this list "+b);
//Hashtable//
Hashtable ages = new Hashtable();
ages["Sabbir"] = 28;
ages["Rahim"] = 21;
ages["Karim"] = 25;
// Console.WriteLine("Age of Sabbir " + ages["Sabbir"]);
// we can't use for loop in Hashtable. We need Foeratch loop
/* foreach (DictionaryEntry age in ages)
* {
* Console.WriteLine(age.Value);
* }
*
* foreach (DictionaryEntry age in ages)
* {
* Console.WriteLine(age.Key);
* }
*/
foreach (DictionaryEntry age in ages)
{
string c = (string)age.Key;
int d = (int)age.Value;
Console.WriteLine("{0} => {1}", c, d);
}
// Boxing
int k = 10;
object box = k;
Console.WriteLine(k.GetType());
Course c5 = new Course();
box = c5;
Console.WriteLine(c5.GetType());
// UnBoxing
c5 = (Course)box;
// Sorted List [ print sequenly]
SortedList s1 = new SortedList();
s1["en-us"] = "United stste";
s1["en-uk"] = "United kingdom";
s1["bn"] = "Bangla";
s1["in"] = "India";
s1["ar"] = "Arabic";
foreach (DictionaryEntry s in s1)
{
string e = (string)s.Key;
string f = (string)s.Value;
Console.WriteLine("{0} => {1}", e, f);
}
}
static void Main(string[] args)
{
int a = 10;
string b = "Hello";
float c = 2.32f;
char d = 'd';
bool e = true;
int[] f = new int[6] {
1, 2, 3, 4, 5, 6
};
ArrayList Array1 = new ArrayList();
ArrayList Array2 = new ArrayList()
{
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
};
Array1.Add(a);
Array1.Add(b);
Array1.Add(c);
Array1.Add(d);
Array1.Add(e);
Array1.Add(f);
Array1.Add("bcd");
var dcd = Array1[6]; //Just for the sake of explicit typecasting
Array1.Insert(0, a * 2); //inserting value a*2 at 0 index
//by inserting every value will be pushed forward to the next location.
Array1.AddRange(Array2);//adding another array list at the end of the first array list
for (int i = 0; i < Array1.Count; i++)
{
Console.WriteLine("Value from {0} index ", i);
Console.WriteLine(Array1[i]);
}
Console.WriteLine("\n Ended The array List Now moving towards next Collection \n\n\n");
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//Code for Sorted List (Non generic)
Console.WriteLine("From Sorted List Nongeneric");
int j = 0;
SortedList myNames = new SortedList();
myNames.Add(j, a);
j++;
myNames.Add(j, b);
j++;
myNames.Add(j, c);
j++;
myNames.Add(j, d);
j++;
myNames.Add(j, e);
j++;
myNames.Add(j, f);
j++;
Console.WriteLine("Before removing an element");
foreach (DictionaryEntry variable in myNames)
{
Console.WriteLine("{0} {1}", variable.Key, variable.Value);
}
myNames.RemoveAt(0);
Console.WriteLine("After removing an element");
foreach (DictionaryEntry variable in myNames)
{
Console.WriteLine("{0} {1}", variable.Key, variable.Value);
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//Code for Sorted List (Generic)
Console.WriteLine("\n\n\n From Sorted List Generic");
j = 0;
SortedList <int, string> myNames1 = new SortedList <int, string>();
myNames1.Add(j, "a");
j++;
myNames1.Add(j, "b");
j++;
myNames1.Add(j, "c");
j++;
myNames1.Add(j, "d");
j++;
myNames1.Add(j, "e");
j++;
myNames1.Add(j, "f");
j++;
myNames1.Remove(1);
foreach (var variable in myNames1)
{
Console.WriteLine("The value against key {0} is {1}", variable.Key, variable.Value);
}
Console.WriteLine("\n\n\n Using KeyValuePair Property");
foreach (KeyValuePair <int, string> obj in myNames1)
{
Console.WriteLine("{0} {1}", obj.Key, obj.Value);
}
string result;
if (myNames1.TryGetValue(2, out result))
{
Console.WriteLine("true {0}", result);
}
//Console.WriteLine(myNames1[0]);
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//Code for Dictionary implementation starts here
Console.WriteLine("\n\n\n From Dictionary");
Dictionary <char, string> dict = new Dictionary <char, string>();
dict.Add('a', "Ali");
dict.Add('b', "Batman");
dict.Add('c', "Cat");
dict.Add('d', "Dog");
dict.Add('e', "Elephant");
dict.Add('f', "Frog");
foreach (Object obj in dict)
{
Console.WriteLine(obj);
}
dict.Add('g', "Goose");
dict.Remove('a');
Console.WriteLine("\n\n From Dictionary Generic Printing Count of objects");
Console.WriteLine(dict.Count);
Console.WriteLine("\n\n\n From Dictionary Generic using Object");
foreach (Object obj in dict)
{
Console.WriteLine(obj);
}
Console.WriteLine("\n\n\n From Dictionary Generic using KeyValuePair");
foreach (KeyValuePair <char, string> obj in dict)
{
Console.WriteLine("{0} {1}", obj.Key, obj.Value);
}
//Code for HashTable implementation starts here
Console.WriteLine("\n\n\n From Hashtable");
Hashtable hash = new Hashtable();
hash.Add(1, a);
hash.Add('a', b);
hash.Add('b', b);
hash.Add('d', b);
foreach (DictionaryEntry obj in hash)
{
Console.WriteLine("{0} {1}", obj.Key, obj.Value);
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//Code for List implementation starts here
Console.WriteLine("\n\n\n From List generic");
List <int> myList = new List <int>();
myList.Add(1);
myList.Add(21);
myList.Add(2);
myList.Add(0);
myList.Sort();
for (int i = 0; i < myList.Count; i++)
{
Console.WriteLine(myList[i]);
}
myList.RemoveAt(0);
myList.Insert(0, 20);
myList.Sort();
for (int i = 0; i < myList.Count; i++)
{
Console.WriteLine(myList[i]);
}
List <ArrayList> myCollector = new List <ArrayList>();
myCollector.Add(Array1);
myCollector.Add(Array2);
Console.WriteLine("\n\n" + myCollector[0].ToArray().Length);
//Adding dummy student data into the list of students
int age;
float cgpa;
string name;
string email;
string address;
string contactNumber;
List <StudentInfo> myClass = new List <StudentInfo>();
StudentInfo bacs = new StudentInfo();
myClass.Add(bacs);
myClass.Add(bacs);
for (int i = 0; i < 0; i++)
{
Console.WriteLine("Write the age of {0} student", i + 1);
age = int.Parse(Console.ReadLine());
Console.WriteLine("Write the cgpa of {0} student", i + 1);
cgpa = float.Parse(Console.ReadLine());
Console.WriteLine("Write the name of {0} student", i + 1);
name = Console.ReadLine();
Console.WriteLine("Write the email of {0} student", i + 1);
email = Console.ReadLine();
Console.WriteLine("Write the address of {0} student", i + 1);
address = Console.ReadLine();
Console.WriteLine("Write the contactNumber of {0} student", i + 1);
contactNumber = Console.ReadLine();
myClass.Add(new StudentInfo(age, cgpa, name, email, address, contactNumber));
}
foreach (StudentInfo s in myClass)
{
if (s.AGE >= 18)
{
Console.WriteLine("The student details are as follow");
Console.WriteLine("The Name of the student is {0}", s.NAME);
Console.WriteLine("The Age of the student is {0}", s.AGE);
Console.WriteLine("The Cgpa of the student is {0}", s.CGPA);
Console.WriteLine("The Email of the student is {0}", s.EMAIL);
Console.WriteLine("The Address of the student is {0}", s.ADDRESS);
Console.WriteLine("The Contact Number of the student is {0}", s.CONTACTNUMBER);
}
}
var results = from StudentInfo in myClass
where StudentInfo.AGE >= 12
select StudentInfo;
Console.WriteLine("Student with age greater then 12 are as follow");
foreach (StudentInfo s in results)
{
Console.WriteLine(s.AGE);
}
/*
* myClass.Select(x=>new object { name=x.Total})
*
* var results = from s in myClass
* select s;
*
* foreach(StudentInfo info in myClass)
* {
* Console.WriteLine(results[0]);*/
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///
//Code for Stack implementation starts here
Console.WriteLine("\n\n\n Implementation of Stack starts from here \n");
Stack <int> myStack = new Stack <int>(f);
Console.WriteLine("\nStack after entering values using array \n");
foreach (int variable in myStack)
{
Console.Write(variable + ",");
}
Console.WriteLine();
Console.WriteLine("\nStack after entering Value using push \n");
myStack.Push(20);
foreach (int variable in myStack)
{
Console.Write(variable + ",");
}
Console.WriteLine("\nStack after Peeking from it \n");
Console.WriteLine(myStack.Peek());
foreach (int variable in myStack)
{
Console.Write(variable + ",");
}
Console.WriteLine("\nStack after popping element from it \n");
Console.WriteLine(myStack.Pop());
foreach (int variable in myStack)
{
Console.Write(variable + ",");
}
Console.WriteLine();
int check = 24;
if (myStack.Contains(check))
{
Console.WriteLine("true the stack contains the value {0}", check);
}
else
{
Console.WriteLine("False the stack doesnot contains the value {0}", check);
}
//Iplementation of queue starts from here
Queue <int> myQueue = new Queue <int>(f);
Console.WriteLine("\nQueue after entering values from array");
foreach (int variable in myQueue)
{
Console.Write(variable + ",");
}
myQueue.Enqueue(20);
Console.WriteLine("\n\nQueue after using enqueue");
foreach (int variable in myQueue)
{
Console.Write(variable + ",");
}
Console.WriteLine("\n\nQueue after Dequeue method");
Console.WriteLine("The value returned from the dequeue method is " + myQueue.Dequeue());
foreach (int variable in myQueue)
{
Console.Write(variable + ",");
}
Console.WriteLine("\n\nPrinting the count of elements in the queue \n" + myQueue.Count());
Console.WriteLine("\nQueue after Peeking from it");
Console.WriteLine("Value returned from peek method is " + myQueue.Peek());
foreach (int variable in myQueue)
{
Console.Write(variable + ",");
}
Console.WriteLine();
///////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////
//File Hanlding
string path1 = @"C:\Users\Lenovo\source\repos\Collections\Collections\bin\Debug\netcoreapp3.1/DummyData1.txt";
string path2 = @"C:\Users\Lenovo\source\repos\Collections\Collections\bin\Debug\netcoreapp3.1/DummyData2.txt";
string path3 = @"C:\Users\Lenovo\source\repos\Collections\Collections\bin\Debug\netcoreapp3.1/DummyData3.txt";
string Abc = "Hello from the file1";
string Abcd = "Hello from the file2";
/*File.WriteAllText(path1,Abc);
* File.WriteAllText(path2, Abcd);
*/
string DataRead = File.ReadAllText(path1);
Console.WriteLine(DataRead);
//This block is used to to auto close the file after the use
//the file will open at the start of the using block and
//At the end of the block the file is automatically closed.
/*using (StreamWriter sw = File.AppendText(path1))
* {
* sw.WriteLine("\nHello once again using Stream Writer");
* }
*
* using (StreamReader sr = File.OpenText(path2))
* {
* string readed = "";
* while ((readed = sr.ReadLine()) != null)
* {
* Console.WriteLine(readed);
* }
* } */
DataRead = File.ReadAllText(path1);
Console.WriteLine("\n\n" + DataRead + "\n\n");
DataRead = File.ReadAllText(path2);
Console.WriteLine("\n\n" + DataRead + "\n\n");
/*FileStream file = new FileStream(path3, FileMode.OpenOrCreate , FileAccess.ReadWrite);
* //file.Write("Hello")
* file.WriteByte(66);
* file.Close();
*/
using (FileStream file1 = new FileStream(path3, FileMode.Append, FileAccess.Write))
{
using (StreamWriter sw = new StreamWriter(file1, Encoding.UTF8))
{
int[] arrays = new int[10] {
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
};
foreach (int num in arrays)
{
sw.Write(num + " ");
}
sw.WriteLine("\nHelpppp");
}
}
using (FileStream file1 = new FileStream(path3, FileMode.Open, FileAccess.Read))
{
using (StreamReader sr = new StreamReader(file1))
{
string line = sr.ReadLine();
while (line != null)
{
Console.WriteLine(line);
line = sr.ReadLine();
}
}
}
//Exception Handling Code
int[] except = new int[3] {
1, 2, 3
};
try
{
Console.WriteLine(except[10]);
}
catch (Exception error)
{
Console.WriteLine(error.Message);
}
finally
{
Console.WriteLine("The try catch Block has ended");
}
/*using (FileStream fs = new FileStream(path1, FileMode.Open, FileAccess.Read))
* {
* using(StreamWriter stw = new StreamWriter(fs))
* {
*
* }
*
* using(StreamReader str = new StreamReader(fs))
* {
*
* }
*
* }*/
//Manipulating the tuples in the form of an array
Tuple <int, float, double, char, string>[] studentTuples = new Tuple <int, float, double, char, string> [2];
/* Tuple<int, float, double, char, string>[] studentFiltered = new Tuple< int, float, double, char, string>[2];
*/
for (int i = 0; i < 2; i++)
{
studentTuples[i] = new Tuple <int, float, double, char, string>(1, 2.2f, 3.3, 'a', "abcd");
}
/*int iterator=0;*/
foreach (Tuple <int, float, double, char, string> tp in studentTuples)
{
/*if (tp.Item5.Length >= 3)
* {
* studentFiltered[iterator] = tp;
* iterator++;
* }*/
Console.Write(tp.Item1 + " , ");
Console.Write(tp.Item2 + " , ");
Console.Write(tp.Item3 + " , ");
Console.Write(tp.Item4 + " , ");
Console.WriteLine(tp.Item5);
}
//var v1 = new Tuple.Create(1,2);
//Manilulating with the string array using LINQ queries
string[] myNamesArray = new string[22] {
"Ali", "Yar", "Wamik", "Afaq", "Salal", "Daniel", "June", "Juliet",
"danyyal", "Yousuf", "Bukht", "Yar", "Arshad", "Kainat", "aiman", "sidra",
"Tooba", "zeeshan", "Hyper", "Don", "Chaudary", "Muaaz"
};
var MyQueryResult = from names in myNamesArray
where names.Length >= 3
select names;
Console.WriteLine("name---first2letters--Caps--length");
foreach (var names in MyQueryResult)
{
Console.Write(names + " ");
Console.Write(names.Substring(0, 2) + " ");
Console.Write(names.ToUpper() + " ");
Console.WriteLine(names.ToUpper().Length);
}
//Maipulatin with Tuple array using the LINQ queries
var myTupleResults = studentTuples.Where(tuples => tuples.Item5.Substring(0, 2) == "ab" && tuples.Item5.Contains('b') && tuples.Item1 == 1);
//We can write queries in Two ways
/*from tuples in studentTuples
* where tuples.Item5.Substring(0, 2) == "ab" && tuples.Item5.Contains('b') && tuples.Item1==12
* select tuples;*/
//Getting array in the resul of LINQ Queries
var myTupleResultsArray = studentTuples.Where(tuples => tuples.Item5.Substring(0, 2) == "ab" && tuples.Item5.Contains('b') && tuples.Item1 == 1).ToArray();
Console.WriteLine(myTupleResultsArray[0]);
Console.WriteLine("\n\n From Tuples results\nName---first2letters--Caps--length");
foreach (var tuples in myTupleResults)
{
Console.Write(tuples.Item1 + " ");
Console.Write(tuples.Item2 + " ");
Console.Write(tuples.Item3 + " ");
Console.Write(tuples.Item4.ToString() + " ");
Console.WriteLine(tuples.Item5.Substring(0));
}
Program pg = new Program();
MakeNoise mk = new MakeNoise(pg.Noise);
mk(10);
}