In JavaScript, functions are a fundamental building block of the language. They allow us to encapsulate a piece of code that we can reuse throughout our application. In this article, we will discuss function invocation and how it relates to function scope and block scope in JavaScript. Function Invocation Function invocation refers to the process … Read More “Function Invocation and Scope in JavaScript” »
Hoisting is a term used in JavaScript to describe the behavior of variable and function declarations being moved to the top of their respective scopes during the execution of the code. This can sometimes lead to unexpected behavior and bugs in your code if you’re not familiar with how it works. In this article, we’ll … Read More “Understanding Hoisting in JavaScript” »
In JavaScript, scope determines the visibility and accessibility of variables and functions. The scope chain is a mechanism for resolving variable and function references in the context of the code execution. In this article, we will explore the scope chain and how to use it for inheritance in JavaScript. What is Scope Chain? The scope … Read More “Understanding Scope Chain in JavaScript” »
In JavaScript, an execution context is the environment in which a piece of code is executed. It consists of three main components: the Variable Environment, the Lexical Environment, and the This Binding. Understanding how these components work together is key to understanding how JavaScript code is executed. Variable Environment The Variable Environment is where the … Read More “Javascript | execution context & Lexical Environment” »
there are several ways to remove an element from an object. Here are some of the most common methods: The delete keyword can be used to remove a property from an object. Here’s an example: const obj = { a: 1, b: 2, c: 3 }; delete obj.b; console.log(obj); // { a: 1, c: 3 … Read More “Method of removing an element from object” »
There are several ways to remove an element from an array using JavaScript: The splice() method changes the contents of an array by removing or replacing existing elements and/or adding new elements. const fruitList = [“apple”, “banana”, “orange”, “kiwi”]; // remove one element starting from index 1 fruitList.splice(1, 1); console.log(fruitList); // logs [“apple”, “orange”, “kiwi”] … Read More “Method to remove an item from an array” »
Node.js is a popular platform for building scalable, high-performance applications. At the core of Node.js lies the event loop mechanism, which allows Node.js to handle large numbers of I/O operations in a non-blocking, asynchronous way. Understanding how the event loop works is essential for building efficient Node.js applications. The event loop mechanism in Node.js is … Read More “Node.js and Event Loop Mechanism: Understanding the Phases” »
you may have heard of the term “garbage collection.” It is an essential concept in modern programming languages like JavaScript. It is an automated process that frees up memory occupied by objects that are no longer in use. This article will provide you with an in-depth understanding of garbage collection in JavaScript. What is Garbage … Read More “Garbage Collection in JavaScript: Understanding How It Works” »
To access and process nested objects, arrays, or JSON in JavaScript, you can use dot notation or square bracket notation to access nested properties, as well as methods such as map, filter, reduce, and forEach to process nested arrays. Here are some examples: const obj = { name: ‘John Doe’, age: 30, address: { street: … Read More “How do you access nested objects, arrays, or JSON in javascript?” »
To return the response from an asynchronous call in JavaScript, you have a few options depending on the specific context and requirements of your code. Here are three common approaches: In this example, doAsyncTask makes a dummy API call using the fetch function. When the API returns a response, it is converted to JSON using … Read More “How to return a response from an asynchronous call in javascript?” »