When working with arrays in JavaScript you may need to reverse it. Reversing the array will make the last item the first one, the second to last item the second one, and so on. This tutorial shows how to reverse an array in JavaScript and what side effects to keep …

JSON (JavaScript Object Notation) is a data format used across applications to share data. The applications can use different languages and they are able to share information using the JSON format. Node.js and NPM use a JSON file storing configuration details: the package.json file. Besides the package.json …

Node.js can extract a file name from a given path. The path can be an absolute or relative path. You can then let Node.js do the parsing and return the file path. {{outline}} Get the File Name With Extension You can retrieve the file name from a given …

Sometimes it’s necessary to detect the operating system running the Node.js process. Node.js comes with the built-in os module providing methods to detect the current platform. Use the methods to create a utility function detecting whether you’re currently running Node.js on Windows. {{outline}} Check if …

Sometimes you need to detect the platform that runs your Node.js process. You can do that by using Node.js’ built-in os module. It provides a method returning the operating system and you can then compare the platform against macOS. {{outline}} Check if the Operating System is macOS The …

In some situations, you need to detect the operating system running the Node.js process. You can do that by using Node.js’ built-in os module. {{outline}} Check if the Operating System is Linux The os module in Node.js provides a platform method. This platform method allows you to …

In some situations, you may need to retrieve the extension of a file on your local disk. Node.js comes with built-in functionality that you can use in your application. This tutorial shows you how to retrieve the file extension in Node.js. {{outline}} Retrieve the File Extension Node.js’ …

Node.js ships with the native fs module to interact with the local file system. The fs module supports retrieving statistics for a file on your local disk. You may also get the size of a file from these statistics. This tutorial shows you how to retrieve the file size …