Agile has failed. Officially.

Either I’m a gifted oracle, and all of my friends are, or Agile really was just a stupid idea to begin…

Testing the React component state with Jest

The number one rule of testing the state: do not test the state. It’s fine the way it is.

There is a lot of wisdom behind this. After all, what is there to test? Let’s see a simple example of useState():

Deploying Typescript Node.js applications to Heroku (with static files)

So how exactly can you feed your Typescript-based Node.js project into Heroku’s belly, along with static files?

Running Promises in a loop sequentially, one by one

Promises are perhaps the most complicated and frustrating thing in the Javascript world (not accounting for Javascript itself). While the concept is actually not that super hard to grasp, asynchronous stuff can make even senior programmers…

Uploading form fields and files at the same time with Multer (Node.js, Typescript)

Multer is a widely used middleware to handle file uploads and multipart/form-data stuff received by your Node.js server application. There are tons of documentation and tutorials to teach…

Why is “strict MIME type checking” blocking the static serving of Vue frontend files?

We just finished a Vue frontend app for a Node.js application. Let’s dispatch it to the server and make it public!

How to test useRef() without mocking useRef()?

Sometimes you need to expose some of your React component’s methods to its parent component with useImperativeHandle() and forwardRef(). In an earlier post I wrote about testing these exposed methods. This time let’s look at the parent component…

Conditional update in PostgreSQL (updated!)

What should you do if you only want your column to be updated if the supplied value is valid?

Let’s say we are updating a user’s profile. There are many different fields:, name, email address, phone number, etc. But the user is…

So much for Snapchat’s security!

My face when I accidentally hack into someone’s account… but it just happened! What sort of idiots are…