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Articles by Chandu yadav
Page 38 of 81
How can we assign a bit value as a number to a user variable?
As we know that the default type of a bit values assigned to user variables is binary strings but we can also assign a bit value to a number by using the following two methods −By using CAST() functionWith the help of CAST(… AS UNSIGNED) the bit value can be assigned a number. The following example will illustrate it −mysql> SET @abc = CAST(0b1000011 AS UNSIGNED); Query OK, 0 rows affected (0.00 sec) mysql> Select @abc; +------+ | @abc | +------+ | 67 | +------+ 1 row in set (0.00 sec)By adding 0(+0)The bit value can be assigned ...
Read MoreWhat is a non-static class in C#?
Non-static classes can be instantiated, whereas static classes cannot be instantiated i.e. you cannot use the new keyword to create a variable of the class type.Non-static classes can have instance method and static methods.Access the members of a static class by using the class name itself, whereas Static class is sealed.Example of non-static class −public class CalculateExample of static class −public static class Calculate
Read MoreString format for Double in C#
Use the static method String.Format for form double string format in C#.For three decimal places −String.Format("{0:0.000}", 987.383); String.Format("{0:0.000}", 987.38); String.Format("{0:0.000}", 987.7899);For thousands separator −String.Format("{0:0,0.0}", 54567.46); String.Format("{0:0,0}", 54567.46);To format string −Exampleusing System; class Demo { public static void Main(String[] args) { Console.WriteLine("Three decimal places..."); Console.WriteLine( String.Format("{0:0.000}", 987.383)); Console.WriteLine( String.Format("{0:0.000}", 987.38)); Console.WriteLine(String.Format("{0:0.000}", 987.7899)); Console.WriteLine("Thousands Separator..."); Console.WriteLine(String.Format("{0:0,0.0}", 54567.46)); Console.WriteLine(String.Format("{0:0,0}", 54567.46)); } }
Read MorePrivate Methods in C#
Private Methods can only be used inside the class. To set private methods, use the private access specifier.Private access specifier allows a class to hide its member variables and member functions from other functions and objects. Only functions of the same class can access its private members. Even an instance of a class cannot access its private members.The following is an example −Exampleusing System; class Demo { private int displayOne() { return 10; } public int displayTwo() { return 10; } } class Program { static ...
Read MoreOptional property in a C# class
A property is optional if it is possible and valid for it to have null. A property whose CLR type cannot have null cannot be configured optional.An example optional attribute usage −Example[AttributeUsage(AttributeTargets.Property, Inherited = false, AllowMultiple = false)] internal sealed class OptionalAttribute : Attribute { } public class Employee { public string EmpName { get; set; } [Optional] public string AlternativeName { get; set; } }
Read MorePrint with your own font using C#
To print your own font in C#, firstly construct −FontFamily objectFont ObjectThe FontFamily object sets the typeface like Arial, TimesNewRoman, etc, whereas the Font object sets the size and style of font.Let us create an Arial font style.FontFamily myFontFamily = new FontFamily("Arial"); Font myFont = new Font( myFontFamily, 20, FontStyle.Bold, GraphicsUnit.Pixel);Above, we have set the FontFamily object. The first parameter passed to the Font() is the FontFamily object “myFontFamily”, then comes the size of the font. The third argument sets the style.
Read MoreGenerics vs non-generics in C#
There are two types of collections in C#: non-generic collections and generic collections.Generics in C#Generic collections hold elements of same datatypes.For example −ListDictionaryHashsetDictionary − Dictionary is a collection of keys and values in C#. Dictionary is included in the System.Collection.Generics namespace.Hashset − HashSet in C# eliminates duplicate strings or elements in an array.In C#, it is an optimized set collection.Non-Generics in C#Non-generic collections hold elements of different datatypes.The following are the non-generic collections: ArrayList, BitArray.ArrayList − It represents ordered collection of an object that can be indexed individually. ArrayList is an alternative to an array. However, unlike array you ...
Read MoreWhat is index-based I/O BitArray collection in C#?
The BitArray class manages a compact array of bit values, which are represented as Booleans, where true indicates that the bit is on (1) and false indicates the bit is off (0).The following are the method of the index-based BitArray collection −Sr.No.Method & Description1public BitArray And(BitArray value);Performs the bitwise AND operation on the elements in the current BitArray against the corresponding elements in the specified BitArray.2public bool Get(int index);Gets the value of the bit at a specific position in the BitArray.3public BitArray Not();Inverts all the bit values in the current BitArray, so that elements set to true are changed to ...
Read MoreWhat is the System.Reflection.Module in C#?
The System.Reflection namespace contains classes that allow you to obtain information about the application and to dynamically add types, values, and objects to the application.It has a module constructor that initializes a new instance of the Module class. A module is a portable executable file that has one or more classes and interfaces.Let us see an example of System.Reflection in C# −Exampleusing System; using System.Reflection; [AttributeUsage(AttributeTargets.All)] public class HelpAttribute : System.Attribute { public readonly string Url; public string Topic // Topic is a named parameter { get { return ...
Read MoreHow to define character constants in C#?
Character literals are enclosed in single quotes. For example, 'x' and can be stored in a simple variable of char type. A character literal can be a plain character (such as 'x'), an escape sequence (such as '\t'), or a universal character (such as '\u02C0').Let us see an example how to define a character constant in C# −using System; namespace Demo { class Program { static void Main(string[] args) { Console.WriteLine("Welcome!\t"); Console.WriteLine("This is it!"); Console.ReadLine(); } } }Above, we ...
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