Support Campaign Zero, the Equal Justice Initiative, and local bail funds.

Programming

Reactive Stack: Fully reactive real-time web application

My new course, Reactive Stack: Fully reactive real-time web application is now available on Udemy.

The Reactive Stack course is intended for web developers who want to create fully reactive real-time web applications but are unhappy with the vendor lock-in that comes with some of the most popular frameworks for that task.

In this course, I will show you how to implement a real-time reactive web application using frameworks, databases and programming languages of your choice and how to easily substitute any part of your stack with another alternative without common headaches that come with such a task.

The goal of this course is to show a fully generic solution, completely independent of any language, database or framework.

Check it out and let me know how you liked it. 🙂

By Predrag, ago

Multiple NodeJS versions on Windows

I recently got into a problem where a project I was working on was not able to use anything other than node 8, which prevented me from experimenting with any new packages. So I gave nvm-windows a try and I could not be happier. Here’s what you need to do to make it work.

First, execute npm -g list --depth=0 and write down all those global packages you want to keep. Then do the same with yarn global list.

After everything is set up with nvm, you will need to install these global packages for every version of Node you decide to use. For me, I went with 14.4.0, 12.18.1 and 8.17.0 and so I had to repeat installing these 3 times. Of course, only if you really need them in each setup, otherwise just install what you need. For me, I use yarn 1.3.2 with node 8 and yarn 1.22.4 with node 12 and 14. Again, do what you need in each setup.

Go ahead and uninstall all global packages from both npm and yarn listings you just ran. Naturally, you want to clean up yarn global packages first, since yarn is one of npm global packages 😉

Now, go ahead and uninstall node, completely. I recommend geek-uninstaller for this.

Download and install the latest nvm-windows: https://github.com/coreybutler/nvm-windows/releases

Make sure both nvm and nodejs are installed in a path without spaces 🙁

Once nvm is installed, simply execute nvm install and the specified version of nodejs will be installed. You can pick a version from the nodejs release listing: https://nodejs.org/en/download/releases/

When you have more than one version of node installed, you can always check what you have by executing nvm list:

To switch to another version, simply execute nvm use .

At this point, go thoroughly through each version you installed and add all global packages you need. Keep in mind to specify the version of the package, if that is needed. For example, I used npm -g i yarn for my node versions 12 and 14, and npm -g i [email protected] for my node version 8.

In the future, if you want to update a given version, you can use nvm install NEW_VERSION --reinstall-packages-from=OLD_VERSION, as described in this stackoverflow answer.

And that’s that 🙂

Finally, if you ever forget the nvm commands, simply execute nvm:

By Predrag, ago

Clean Code – Uncle Bob / Lessons 1-6

Lesson 1

In this first lesson, Uncle Bob demonstrates the need to write a clean code and establishes the bases to achieve it, being these bases of a social and scientific nature. Making it clear that the future of programming is based on an ethical and polite code.

Lesson 2

In this second lesson, Uncle Bob teaches us the purpose of comments in the code, breaking the paradigm that commenting is something “I have to do” for the simple fact that we mistakenly consider that commenting is a good practice. For Uncle Bob, writing a comment is a sign of failure, since a good code must be able explain by itself: Fewer Comments = Better Code.

Lesson 3

In this third lesson, Uncle Bob focuses on raising awareness, given the need to increase the level of criteria in code production. Pointing to the lack of preparation in most programmers, as one of the main reasons for the inefficiency in software development today. Uncle Bob proposes a series of Expectations, through which he hopes to instill in the programmers, the knowledge and desire to prosper towards a way of programming based on ethics and responsibility.

Lesson 4

In this fourth lesson, Uncle Bob introduces us to a software development methodology oriented through testing. This is the Test-Driven Development (TDD), a practice with a long learning curve, but with significant results to generate a more robust, safer, more maintainable code and with greater development efficiency. Among other things, Uncle Bob shows us his point of view about the evolution of software to this day and its bright future.

Lesson 5

In this fifth lesson, Uncle Bob criticizes the culture of “making a disaster as quickly as possible” to generate economic gains, obtaining in the long term, exactly the opposite effect, due to a generalized lack of awareness, about the importance and purpose of a good Software Architecture. In this chapter, you will learn the fundamentals of software architecture, its rules, the value of discipline in the production of quality code, and the responsibility of disseminating the need to implement these good practices in the community of programmers.

Lesson 6

In this sixth lesson, Uncle Bob portrays us through different situations, the problem of adjusting software production time to delivery times. A divergence between the needs of the client and the commercial commitments, and the needs of the programmer to produce quality software. To solve the problem of the temporary gap between production and the deadline, Uncle Bob teaches us the basics of Agile development techniques for the optimal management of software projects.

By Predrag, ago