TypeScript Anonymous Functions - Syntax & Examples - Tutorial Kart

TypeScript Anonymous Functions ¨C Syntax & Examples

TypeScript Anonymous Functions

TypeScript Anonymous Functions are functions that are not bound to an identifier i.e., anonymous functions do

not have name of the function.

Anonymous functions are used as inline functions. These are used when the function is used only once and

does not require a name. The best example is a callback function.

Syntax of Anonymous Function in TypeScript

var varName = function( [arguments] ) {

// function body

}

var is the keyword

varName is the name of the variable in which function is stored

function (is a keyword) is an operator that creates a TypeScript Function during runtime

arguments are optional variables that could be declared for the anonymous function

function body can contain multiple lines of code

Example 1 ¨C Anonymous function with arguments

In the following example, an anonymous function is defined and assigned to a variable named result.

example.ts

var result = function(a:number, b:number) {

return a+b

}

var c = result(12,2) // c = 14

When the above code is transpiled, following JavaScript code is generated.

example.js

var result = function (a, b) {

return a + b;

};

var c = result(12, 2); // c = 14

Example 2 ¨C Anonymous function with no arguments

example.ts

var displayMessage = function () {

console.log("Hello User!")

}

displayMessage()

Transpiled JavaScript code would be as shown below.

example.js

var displayMessage = function () {

console.log("Hello User!");

};

displayMessage();

Output

Hello User!

Conclusion

In this TypeScript Tutorial ¨C TypeScript Anonymous Functions, we have learnt how to define an anonymous

function with and without parameters using the help of detailed examples.

TypeScript

?

TypeScript Tutorial

?

TypeScript Variables

?

TypeScript if

?

TypeScript if-else

?

TypeScript Switch

?

TypeScript For Loop

?

TypeScript While Loop

?

TypeScript Do-While Loop

?

TypeScript Arrays

?

TypeScript Tuples

?

TypeScript Unions

?

TypeScript Functions

?

TypeScript Anonymous Functions

TypeScript Object Oriented Concepts

?

TypeScript Class

?

TypeScript Inheritance

?

TypeScript Method Overriding

?

TypeScript Interface

TypeScript String Operations

?

TypeScript String Length

?

TypeScript String Split

 ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download