Higher-order functions are a fundamental concept in both JavaScript (JS) and TypeScript (TS). A higher-order function is a function that takes one or more functions as arguments or returns a function as its result. These functions enable more flexible and expressive code by allowing you to treat functions as first-class citizens. Here’s an explanation of…
Interfaces allow you to define the structure of objects. You can extend an interface from another interface to build a new interface that inherits properties from the base interface. This promotes code reuse and allows you to create more specialized interfaces while maintaining a consistent structure. interface BasicAddress {name?: string;street: string;city: string;country: string;postalCode: string;} interface…
Parameter De-structuring: Parameter de-structuring allows you to unpack properties of objects passed as function arguments into local variables within the function body. This can make code more readable and eliminate the need for multiple property accesses. type ABC = { a: number; b: number; c: number }; function sum({ a, b, c }: ABC) {console.log(a…
Rest Arguments: The rest parameter syntax allows you to pass a variable number of arguments to a function. This is useful when you want to handle multiple arguments without explicitly listing them. The spread syntax is used to pass multiple values from an iterable (like an array) as individual arguments to a function. const arr1…
Rest parameters in TypeScript and JavaScript allow you to define functions that can accept a variable number of arguments as an array. This is useful when you want to work with functions that can take different numbers of arguments without explicitly specifying them in the function signature. Rest parameters are denoted by the ellipsis (...)…
An interface is a way to define a contract that specifies the structure of an object. It defines the properties and methods that an object should have. Interfaces provide a mechanism for type checking and ensure that objects adhere to a certain shape. interface Person {firstName: string;lastName: string;age: number;} const person: Person = {firstName: "John",lastName:…
Type aliases in TypeScript allow you to create custom names for existing types, making your code more readable and expressive. They are particularly useful for complex type annotations, unions, intersections, and for creating more meaningful names for combinations of types. Basic Type Alias: You can create a type alias using the type keyword. This is…
Functions: are the primary means of passing data around in JavaScript. TypeScript allows you to specify the types of both the input and output values of functions.enabling better type checking and code clarity.Function Declaration: You can declare a function using the function keyword. You can specify parameter types and the return type using type annotations.…
TypeScript is to be a static typechecker for JavaScript programs – in other words, a tool that runs before your code runs (static) and ensures that the types of the program are correct (typechecked). Arrays: Arrays in TypeScript are similar to arrays in JavaScript, but with the added benefit of type annotations and type inference.…
Type Coercion:- Type coercion, also known as type conversion, refers to the process of automatic or implicit conversion of values from one data type to another. This is often necessary when performing operations involving values of different types. Type coercion can be either explicit or implicit. For example, in JavaScript: var x = 5; var y =…
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