With code coverage, we can measure the percentage of our code that runs with our test. In this article, we learn how to measure our coverage and discuss whether it is a metric worth considering. We will understand its benefits and limitations and see how a high code coverage can mislead us into thinking that […]
JavaScript started as a simple language used to make static websites more dynamic and interactive. However, projects written in JavaScript began getting increasingly complex a long time ago. Because of that, it quickly became apparent that we needed a way to break the code into smaller, manageable pieces. Throughout the years, people have had many […]
With monorepos, we keep the code for different projects together in one big repository. This makes sharing and reusing the code across multiple projects easier and can simplify dependency management. Each project has its own directory, scripts, and dependencies. We can use Yarn workspaces designed with monorepos in mind to handle all that. In this […]
Managing money is a part of developing web applications that we can’t cut corners on. This article explores various data types built into PostgreSQL and Prisma that we could use to handle finances. We also discuss which ones to avoid and why. Why we should avoid floating point numbers We are used to using fractions […]
It’s been a long time since the JavaScript projects began to grow in complexity. Because of that, breaking the code into manageable pieces became essential. In the history of JavaScript development, we went through many different approaches to splitting our code into modules. Good examples include solutions such as CommonJS, which is used in NodeJS. […]
Often, we might have a situation where a single entity, such as a comment, needs to be associated with more than one type of table. For example, the user might be able to comment on articles, photos, and more. One solution would be to create a separate table for each type of comment, such as […]
Ensuring that our application is secure is one of the most important things we must do as developers. One of the ways to protect our application from well-known vulnerabilities is to set appropriate response headers. There are quite a lot of different security-related response headers to consider. Fortunately, the helmet library can set them for […]
Command Line Applications are very useful for developers. We can interact with them by executing specific commands in the terminal, giving us much control and flexibility. You probably already interact with various CLI applications, such as Git or NPM. Interestingly, we can also use NestJS to create a Command Line Interface (CLI) application. In this […]
Some of our SQL queries can become quite complicated. Fortunately, we can create views that act as aliases for the select queries. They have a form of virtual tables with rows and columns that we can select from but can’t insert any data into. We can also use materialized views that store the query results […]
Let’s say two people want to video chat using our app. One solution would be for the first person to stream their camera feed to our server. Then, our application would pass this data to the other caller. Unfortunately, our application acting as a middleman could introduce a significant lag, especially if our server is […]
