The map function in JavaScript is a method that is used to apply a function to each element in an array, in order to produce a new array with the modified elements. It is a higher-order function, meaning that it takes a function as an argument and returns a new function. The syntax for the […]

The JavaScript forEach method allows you to iterate over an array, executing a callback function for each element in the array. It is similar to the for loop but is more concise and easier to read. The forEach method is a function of the Array prototype, which means it can be called on any array […]

Middleware is a technique that allows software developers to make specific code run anytime an Express route is called. The middleware pattern makes it possible to execute code between a server receiving a request and sending a response. Hence the name Middleware, as it lives in the middle. Express uses middleware to apply behavior to […]

Express Routers are a way to organize your Express application such that your primary app.js file does not become bloated and difficult to reason about. As you’re building an Express application or API, you’ll soon notice that the routes continue to pile up in app.js. This makes the file quite long and hard to read. […]

JavaScript is the language of the web and you are likely familiar with it running in all of your favorite web browsers. JavaScript also runs on the server via Node and in this tutorial, we’ll take a look at setting up routes in the popular Express framework. To start using Express, first, make sure Node […]

Without fail, you are going to need to iterate or loop over data in your programs no matter the language. In JavaScript, we have several loop constructs to do this, as well as the so-called higher-order functions. These higher-order functions allow a more concise syntax to allow you to iterate over a collection while applying […]