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Articles by Chandu yadav
Page 11 of 81
What are Base and Derived Classes in C#?
A class can be derived from more than one class or interface, which means that it can inherit data and functions from multiple base classes or interfaces.For example, Vehicle Base class with the following Derived Classes.Truck Bus MotobikeThe derived class inherits the base class member variables and member methods.In the same way, the derived class for Shape class can be Rectangle as in the following example.Exampleusing System; namespace Program { class Shape { public void setWidth(int w) { width = w; } public void setHeight(int h) ...
Read MoreFind frequency of each word in a string in Java
In order to get frequency of each in a string in Java we will take help of hash map collection of Java.First convert string to a character array so that it become easy to access each character of string.Now compare for each character that whether it is present in hash map or not in case it is not present than simply add it to hash map as key and assign one as its value.And if character is present than find its value which is count of occurrence of this character in the string (initial we put as 1 when it ...
Read MoreClear a Hashtable in C#
Clear a Hashtable, using the Clear() method in C#.The following is our Hashtable −Hashtable h = new Hashtable(); h.Add(1, "Amit"); h.Add(2, "Sachin"); h.Add(3, "Rahul");Use the clear method.h.Clear();If you will now try to display the Hashtable, nothing would get display since the Hashtable is empty.Exampleusing System; using System.Collections; public class Demo { public static void Main() { Hashtable h = new Hashtable(); h.Add(1, "Amit"); h.Add(2, "Sachin"); h.Add(3, "Rahul"); Console.WriteLine("Keys and Values list:"); foreach (var key in h.Keys ) { ...
Read MoreHow to handle empty collections in C#
To handle empty collections, use the DefaultIfEmpty() method in C#.If an array is empty, then using this method will show the default method instead of displaying an error.Let’s say we have an empty list.List myList = new List();Now, use DefaultIfEmpty() method to display the default value.myList.DefaultIfEmpty();Exampleusing System; using System.Linq; using System.Collections.Generic; class Demo { static void Main() { List myList = new List(); var res = myList.DefaultIfEmpty(); foreach (var a in res) { Console.WriteLine(a); } } }Output0
Read MoreHow to sort a list in C#?
Set a list with some values. Here, we have a list of strings.var cars = new List() {"Mercedes", "Audi", "Jaguar" };To sort, simply use Sort() method.cars.Sort();The following is an example showing how to sort a list in C#.Exampleusing System; using System.Collections.Generic; public class Program { public static void Main() { var cars = new List() {"Mercedes", "Audi", "Jaguar" }; Console.WriteLine("Original Array ="); foreach (var name in cars) { Console.WriteLine(name); } // sort cars.Sort(); Console.WriteLine("Sorted Array ="); foreach (var name in cars) { Console.WriteLine(name); } } }OutputOriginal Array = Mercedes Audi Jaguar Sorted Array = Audi Jaguar Mercedes
Read MoreHow to convert JS date time to MySQL datetime?
We can convert JS date time to MySQL datetime with the help of toISOString() function.Let us see an example of JavaScript.Example Web Page Design document.writeln(new Date().toISOString().slice(0, 19).replace('T', ' ')); Current Date is displayed above... OutputThe following is the output.2018-11-23 11:14:38 Current Date is displayed above...
Read MoreC# Queryable SequenceEqual() Method
To check whether two sequences are equal or not, use the SequenceEqual() method.Firstly, set the sequences.Employee emp1 = new Employee { EmployeeRank = 4, EmpName = "Amit", EmpMarks = 90 }; Employee emp2 = new Employee { EmployeeRank = 5, EmpName = "Raman", EmpMarks = 95 }; List employee1 = new List { emp1, emp2 }; List employee2 = new List { emp1, emp2 };Now, find whether the sequences are equal or not.employee1.AsQueryable().SequenceEqual(employee2);Here is the example that shows the result.Exmapleusing System; using System.Linq; using System.Collections.Generic; public class Demo { public static void Main() { Employee emp1 ...
Read MoreC# Numeric (“N”) Format Specifier
The numeric ("N") format specifier converts a number to a string of the following form −"-d,ddd,ddd.ddd…"Above,"-" is a negative number symbol if required,"d" is a digit (0-9), "," indicates a group separator,"." is a decimal point symbolExampleusing System; using System.Globalization; class Demo { static void Main() { double val1 = -5566.789; Console.WriteLine(val1.ToString("N", CultureInfo.InvariantCulture)); int val2 = 87987766; Console.WriteLine(val2.ToString("N3", CultureInfo.InvariantCulture)); } }Output-5,566.79 87,987,766.000
Read MoreReplace All Elements Of ArrayList with with Java Collections
In order to replace all elements of ArrayList with Java Collections, we use the Collections.fill() method. The static void fill(List list, Object element) method replaces all elements in the list with the specified element in the argument.Declaration −The java.util.Collections.fill() method is declared as follows −public static void fill(List
Read MoreHow do we access elements from the two-dimensional array in C#?
A 2-dimensional array can be thought of as a table, which has x number of rows and y number of columns.An element in 2-dimensional array is accessed by using the subscripts. That is, row index and column index of the array.int x = a[1, 1]; Console.WriteLine(x);Let us see an example that shows how to access elements from two-dimensional array.Exampleusing System; namespace Demo { class MyArray { static void Main(string[] args) { /* an array with 5 rows and 2 columns*/ int[, ] a = new int[5, 2] {{0, ...
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