“It’s not about the money, it’s about sending a message. Everything burns!” — The Joker — Most investors would kill for the kind of power that Elon has over markets. With simple tweets, he is able to move markets in a matter of minutes. Not an investor, but an influencer. The supreme one. Tesla, Game Stop, and Etsy have all been on rollercoasters thanks to Elon’s…

Or the check that the other SOLID principles were applied. — No, it doesn’t mean that dependencies should be inverted. The principle states that there should be no direct link between your low-level and high-level modules. In practice, the principle is the easiest of the five and Think about a car. What if a steering wheel was connected directly to the…

How granularity will improve your code resilience to changing requirements in real-world applications. — Both images above are formed from the same number of pixels, but while one looks like a bear, the other one looks more like a shocked square. It is not a difference of quantity, but one of granularity. It is easier to compose something with smaller pieces. The same logic…

Or when to extend a base class and when to compose objects. — And the number one spot for the most overlooked SOLID principle goes to… Liskov substitution. No surprises here. I’m not going to bore you with the scientific definition. In short, the principle states that all object types should be substitutable for their subtypes without changing the correct behavior. The key…

Specialize in a niche and you’ll make money. Step outside and you’ll get the wallet to hold them. — In 1955 Raymond Kroc, a mixer salesman, opened his first franchised McDonald restaurant. He was 53 years old. At an age when most think about retirement, he was searching for new enterprises. Were he to focus on his niche, he would have never built the World’s largest restaurant chain. Our…

Following this principle should spare you from new bugs when adding new features to existing code. — Trucks are one versatile piece of equipment. They can do different tasks based on the type of trailer attached to them. We can even chain trailers (if the load-weight allows it). In short, trucks are open for extension with different trailers but closed to modifications (like engine or cabin). …

Why this principle is often misunderstood and how should it be applied in real-world code. — In the picture above, what would you rather own, the Swiss army knife or all the tools on the right? When traveling, portability is the most important thing. The Swiss army knife is the appropriate tool. But for day-to-day life — would you cut bread, mend the car, or open…

Spending more time on reading rather than writing code is a clear sign of mistrust in the codebase. Command Query Separation (CQS)… — Imagine every time you listen to “Single Ladies” the song would change. 1st time: “All the single ladies...” 2nd time: “Every single lady…” 3rd time: “All sole ladies…” If that were the case, no-one would have shared the song, it wouldn’t have become a hit and we wouldn’t have laughed…

Hint: probably never — The hydrogen propulsion dream has been around for quite some time. Harnessing the most common gas in the universe with water as the only byproduct was seen for a long time as something belonging to Jules Verne’s novels. The thing with SciFi novels is that you never know when it…