Interacting with files on your local hard disk is a common task in application development. Node.js comes with the necessary tooling to do so. The Node.js fs core module provides lots of functions to read, write, delete, and interact with files and directories. This tutorial shows you how …

You’re probably using Node.js’ integrated fs core module to interact with the local hard disk. The fs module provides lots of useful low-level methods to interact with files and directories of any kind. This tutorial shows you how to detect whether a given path on the file system …

During development, you may need to store temporary data on the local file system. This temporary data could be anything short-lived, like the content you read from another source. You may want to transfer this temporary content to your application and have to find storage that you don’t need …

In some situations, you may want to detect the underlying operating system of your application. This may happen if you’re using a feature switch or limited feature support on a given platform. For example, you may allow special characters on Unix-based systems and not on Windows. This tutorial shows …

In JavaScript, an array is a dictionary of indexes to values. Typically, you’ll only see the array items in the format like [1, 2, 3]. The sequential order of the sample array has a fixed length of 3. In some situations, you want to dynamically create an array of …

Node.js provides the node:fs core module allowing you to interact with the local file system. You can create, read, update, or delete files on your computer’s hard disk. This tutorial shows you how to delete a file from your local disk. {{outline}} Delete a File From Local …

When working with Node.js’ crypto module you sometimes need to provide Buffer instances as an argument. For example, the timingSafeEqual function accepts two buffer arguments for comparison. Sometimes your raw values are strings and you need to convert them before using them in your application code. This tutorial shows …

When interacting with data from different sources, like your local data and third-party services, the data has different styles and formats. Let’s say you’re using a camelCase format and other sources use everything in UPPERCASE. Independently of the situation, you may want to transform all keys of an …