Whether you are a JavaScript/TypeScript developer or just have started learning it, an array is something you must deal with frequently. Based on the nature of your work or the problem you are solving, you need to perform array operations and manipulate the arrays. Some common array operations and manipulations are concatenating two arrays, retrieving … Read more
When working with Async javascript, there are three main methods that you will interact with, namely Callbacks, Async/Await, and Promises. This post will focus on the latter – Promises in javascript. Promises are a powerful feature in asynchronous Javascript, and there is a high chance that you will be asked a question regarding Promises in … Read more
Javascript is becoming more popular for building web applications and mobile apps using React Native framework. Therefore, understanding its key concepts can come in quite handy. The “this” keyword in Javascript is a source of confusion and misery for most beginner Javascript developers and even pro-developers. This post aims to give you a beginner-friendly comprehensive … Read more
The Array Object in Javascript supports several methods that you can use to manipulate the array elements. These include the array.map(), array.sort(), array.filter(), array.reduce() etc. The latter – array.reduce() method – is regarded as one of the most tricky array methods and can be quite hard to understand at first glance. However, it’s a powerful … Read more
In Javascript, most users are well familiar with the single exclamation mark (“!”) symbol (the logical “not” operator) used to reverse a boolean value. For example, !true will return false and !false will return true. Now, you must have come across the double exclamation mark !! symbols in your coding journey. Some developers call them … Read more
Checking whether an object is empty is a common and repetitive task for JavaScript and TypeScript developers. It is crucial in cases where the object holds the data from the database, user input, or API. One should always verify the existence of data before proceeding to further operations. Note: The article describes the methods which … Read more
Frameworks such as Express.js assist users in creating Restful APIs. This article will be a tutorial on creating a Node.js REST API that uploads a file to a static folder on the server using Express and Multer. Also, you will work on getting a list of all the files’ details, such as file name and … Read more
Arrays always come in handy when writing any piece of Javascript code. You can use them to hold a list of items either as objects, strings, numbers, or a mix of both strings and numbers. Similar to other programming languages, the Array object in Javascript supports a variety of methods. They include: pop(), push(), toString(), … Read more
Have you ever wondered how the front end and the back end work together to form a complete full-stack application? You probably have heard the term API(Application Programming Interface). It is a mechanism with a functional role that facilitates the communication between the front end and the back end in a web application. API is the interface … Read more
Have you seen a question mark (?) in JavaScript code but you don’t know what it means? What if I tell you the question mark can have not only one meaning, but three different meanings in JavaScript based on how it is used? All of the sudden, the question mark can sound complicated. However, once … Read more