There are situations when you want to reverse a given string value. This tutorial shows you how to reverse a string from a given value. {{outline}} Reverse a String in JavaScript JavaScript doesn’t have a native Str#reverse method. Yet, you can use the existing methods to build your …

JavaScript provides a handful of foundational string methods in the stdlib. You can use the given methods to compose your own utility functions. For example, you can split a multiline string into an array of lines. Each line in that array is a string as well. From here, you can …

You may want to split a JavaScript string into a list of words. JavaScript doesn’t provide a native words method. Yet, it comes with the necessary functionality to build this method yourself. This tutorial shows you how to split a given JavaScript string into an array of words. {{outline} …

Base64 is a binary-to-text encoding scheme used to transport data. The encoding is necessary when the transfer medium is not able to handle binary data. This binary data is then translated to a text representation (base64) and transferred as text. This tutorial shows you how to base64-encode and -decode a …

Deleting keys from an object may happen in a handful of situations. Like, in case a request contains a key-value pair that isn’t allowed to be part of the request and you still want to handle that request. You can then delete the keys not being allowed and proceed …

Node.js introduced async/await as a language feature in version 8.0.0. With async/await the development flow changed to use promises instead of callbacks. Since then, the Node.js team added promise-based APIs to Node’s core. I’m continuously updating this overview of promise-based APIs in …

Sometimes you want to programmatically store files on your local hard drive. You may want to create a nested folder structure on the disk to organize the files. That may require you to create new directories and probably nested directories. This tutorial shows you how to seamlessly create a directory …

UUIDs are typically used as unique identifiers. You can also use them in JavaScript and Node.js. The Node.js team recently added native support to generate a UUID to Node.js’ crypto module. For earlier Node.js versions you may use a community package to generate a UUID. That’ …