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Declare an array and initialize −int[] arr = new int[] { 87, 23, 65, 29, 67 };To sort, use the Sort() method and CompareTo() to compare and display in decreasing order −Array.Sort < int > (arr, new Comparison < int > ((val1, val2) => val2.CompareTo(val1)));Let us see the complete code −Example Live Demousing System; using System.Collections.Generic; using System.Text; public class Demo { public static void Main(string[] args) { int[] arr = new int[] { 87, 23, 65, ... Read More
Firstly, set a string array −string[] arr = new string[] { "Indian", "Moroccon", "American", };To sort the words in lexicographical order −var sort = from a in arr orderby a select a;Example Live DemoLet us see the complete code −using System; using System.Linq; class Program { static void Main() { string[] arr = new string[] { "Indian", "Moroccon", "American", }; var sort = from a in arr orderby a select a; foreach(string res in sort) { Console.WriteLine(res); } } }outputAmerican Indian Moroccon
Java has SortedMap Interface, whereas an equivalent of it in C# is SortedList.SortedList collection in C# use a key as well as an index to access the items in a list.A sorted list is a combination of an array and a hash table. It contains a list of items that can be accessed using a key or an index. If you access items using an index, it is an ArrayList, and if you access items using a key, it is a Hashtable. The collection of items is always sorted by the key value.Let us see an example to work with ... Read More
Use the DateTime.TryParseExact method in C# for Date Format validation.They method converts the specified string representation of a date and time to its DateTime equivalent. It checks whether the entered date format is correct or not.Example Live Demousing System; using System.Globalization; namespace Demo { class Program { static void Main(string[] args) { DateTime d; bool chValidity = DateTime.TryParseExact( "08/14/2018", "MM/dd/yyyy", CultureInfo.InvariantCulture, DateTimeStyles.None, out d); Console.WriteLine(chValidity); } } }OutputTrue
To get the difference between two lists, firstly set two lists in C# −// first list List < string > list1 = new List < string > (); list1.Add("A"); list1.Add("B"); list1.Add("C"); list1.Add("D"); // second list List < string > list2 = new List < string > (); list2.Add("C"); list2.Add("D"); foreach(string value in list2) { Console.WriteLine(value); }To get the difference, use IEnumerable and Except() as shown below. The difference is shown in the third list −IEnumerable < string > list3; list3 = list1.Except(list2);The following is the complete code −Example Live Demousing System; using System.Collections.Generic; using System.Linq; public class Demo ... Read More
Set two arrays that you wish to merge −int[] arr1 = new int[5] { 5, 15, 25, 30, 47 }; int[] arr2 = new int[5] { 55, 60, 76, 83, 95 };Now take a third array that would merge both the above arrays −int[] merged = new int[10];The following is the code that merges two arrays into the third array in C# −Example Live Demousing System; using System.Collections.Generic; class Program { static void Main() { int i = 0; int j = 0; ... Read More
A jagged array is an array of arrays, and therefore its elements are reference types and are initialized to null.Let us see how to work with Jagged array −Declare a jagged array −int [][] marks;Now, let us initialize it, wherein marks is an arrays of 5 integers −int[][] marks = new int[][]{new int[]{ 40, 57 }, new int[]{ 34, 55 }, new int[]{ 23, 44 }, new int[]{ 56, 78 }, new int[]{ 66, 79 } };Let us now see the complete example of jagged arrays in C# and learn how to implement it −Example Live Demousing System; namespace MyApplication ... Read More
Boxing is implicit and unboxing is explicit. Unboxing is the explicit conversion of the reference type created by boxing, back to a value type.Let us see an example of variable and object in C# −// int int x = 30; // Boxing object obj = x; // Un boxing int unboxInt = (int) obj;The following is an example showing Un boxing −int x = 5; ArrayList arrList = new ArrayList(); // Boxing arrList.Add(x); // UnBoxing int y = (int) arrList [0];
The following states what is an unmanaged code −Applications that are not under the control of the CLR are unmanagedThe unsafe code or the unmanaged code is a code block that uses a pointer variable.The unsafe modifier allows pointer usage in unmanaged code.Here is the module showing how to declare and use a pointer variable. We have used the unsafe modifier here.Let us see the example −Examplestatic unsafe void Main(string[] args) { int var = 20; int* p = &var; Console.WriteLine("Data is: {0} ", var); Console.WriteLine("Address is: {0}", (int)p); Console.ReadKey(); }
Let’s say the following is our float −float n = 50.5f;Take an empty string to display the binary value and loop until the value of our float variable is greater than 1 −string a = ""; while (n >= 1) { a = (n % 2) + a; n = n / 2; }Let us see the complete example −Example Live Demousing System; using System.IO; using System.CodeDom.Compiler; namespace Program { class Demo { static void Main(string[] args) { // float to binary Console.WriteLine("float to binary = "); float n = 50.5f; string a = ""; while (n >= 1) { a = (n % 2) + a; n = n / 2; } Console.Write(a); } } }Outputfloat to binary = 1.5781251.156250.31250.6251.250.5