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Anonymous function in C#

 What is anonymous function in C#?

An anonymous function is an "inline" statement or expression that can be used wherever a delegate type is expected.

You can use it to initialize a named delegate or pass it instead of a named delegate type as a method parameter.

You can use a lambda expression or an anonymous method to create an anonymous function. We recommend using lambda expressions as they provide more concise and expressive way to write inline code.

Reference…https://docs.microsoft.com/

How to use anonymous function in C#?

Anonymous function code examples using,

  • Delegate with named method,
  • Lambda expression
  • Delegate with anonymous method
  • Built-in delegates (Func & Action delegates)


delegate void SampleDelegate(string x);

    

public class AnonymousFunctions
    {
         static void DisplayData(string x)
        {
            Console.WriteLine("Data is :" + x);
        }
        static void AnonymousSamples()
        {
            // initialization with a named method.
            SampleDelegate testNamed = new SampleDelegate(DisplayData);
 
            // C# 2.0: A delegate can be initialized with
            // inline code, called an "anonymous method." This
            // method takes a string as an input parameter.
            SampleDelegate TestAnMethod = delegate (string s) { Console.WriteLine(s); };
 
            // C# 3.0. A delegate initialization with a lambda expression.
            // The lambda also takes a string
            // as an input parameter (x). The type of x is inferred by the compiler.
            SampleDelegate TestLambdaExp = (x) => { Console.WriteLine(x); };
 
            //Anonymous function with action generic delegate
            Action<string> TestDelGeneric = (s) => { Console.WriteLine(s); };
 
            // Anonymous function with action delegate without paremeters.
            Action TestDelActGen = () => { Console.WriteLine("Codechef4U samples"); };
 
            //Anonymous Function with func generic delegate, first 2
            // parameters are input, and last parameter is result
            Func<string, string, string> GetCombinedString = (x, y) => { return x+ " " + y; };
 
            //Anonymous Function with predicate generic delegate
            Predicate<string> isValidSurName = (x) => { return x != null && x.Length >2 ? true : false; };
 
            // Invoke the delegates.
            DisplayData("The named method call using delegate .");
            TestAnMethod("The anonymous method call.");
            TestLambdaExp("The lambda call.");
            TestDelGeneric("The action generic delegate .");
            TestDelActGen();
            Console.WriteLine("Full name is: "+ GetCombinedString("Aditya", "Kendre"));
            Console.WriteLine("Is valid name :" + isValidSurName("Kendre"));
        }
    } 

CSS 3 and CSS3 features

CSS

Cascading Style Sheets (CSS) is a simple design language released in 1996, CSS describes how HTML elements are to be displayed on screen, paper, or in other media.

CSS 3

CSS3 version introduced new features that allowed developers to style HTML elements with less CSS code.

CSS3 features

Easy to use 

CSS3 allows developers to style HTML elements easier.

Responsive design           

CSS3 is the latest version, hence it supports responsive design.

Box Shadow

One of the CSS3 new features is the box-shadow property that adds a shadow to an element. Instead of using multiple images around an item, this property lets you add shadow with a short line of code.

Separate reusable modules       

CSS3 can be breakdown into modules.

Attribute Selectors

CSS3 also introduced new selectors in addition to the ones in CSS2. Instead of applying IDs or classes for styling, developers can select HTML elements according to their attributes.

Performance and speed  

CSS3 is faster than basic CSS.

Animation    

Animation and 3D transformations are supported

Compatibility          

CSS3 is backwards-compatible with former CSS versions. It means that CSS3 features work on web pages using older CSS. Browsers that support CSS2 also represent the modifications with CSS3..

Color 

CSS3 supports HSL RGBA, HSLA and the gradient colors. i.e. #fff supported.

Rounded corners  

CSS3 provide codes for setting rounded gradients and corners

Text shadow and effects 

CSS3 has many advance features like text shadows, visual effects, and a wide range of font style and color.

Opacity         

One of the CSS3 properties called opacity makes elements see-through or completely transparent.

Set color and direction of text with CSS properties

Following CSS text formatting properties are used to set color and direction of text

Text color

Text-color property is used to set the color of the text.

Code example

/*color hex value(white)*/
.btn-custom {
    color: #fff;
}
/*color name value(green)*/
.btn-success{
    color:green;
}

Text direction

Text direction property is used to set the direction of the text.

Following are text direction CSS values

Ltr :Text direction goes from left-to-right, this is default value.          
Rtl :Text direction goes from right-to-left
Initial:Sets this property to its default value. Read about initial         
Inherit: Inherits this property from its parent element. Read about inherit

Code example

/*Set the text direction to "right-to-left":*/ 
div.right-to-left {
    direction: rtl;
}