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’ …

We recently added a new feature to the @supercharge/map package: create a map from an object. Objects and maps represent key-value pairs. We iterated through the object’s keys to create the related entries in the map. While iterating through the object keys, we noticed that properties were missing …

Testing objects and asserting their equality can be tricky. For example, in integration tests where you’re sending HTTP requests to a server and receiving responses back. You may want to assert a subset of response headers to match a given expectation. You may not be in control of the …

In some situations, you want to dynamically access a property in a JavaScript object. You typically access dynamic properties using obj[key]. In situations where you want to access multiple properties, you would need to have multiple assignments for the individual properties. The good thing: you can also use JavaScript …

You want a solid and convenient experience when working with the file system in Node.js. The file system comes with its own challenges, like space limitations and access restrictions. Typically you also need to ensure a given state. For example, you want to delete all files from a given …