@gracicot42
Hi! I'm the creator of the kangaru dependency injection library for C++. What I love about that tutorial is that you teach beginners to do it without a framework. A dependency injection library is only there to automate boilerplate that happens in the wiring code, and not essential for dependency injection. Another point (for more advanced programmers) is that technically, dependency injection don't require interfaces to work. union (sum types) or enums can also do the trick when you want your component to let users choose its behaviour, but have a closed set of possible behaviour. This still enable testing without introducing virtual function calls when unneeded. In my case, which might be a C++ only thing, adding virtual functions (any overridable function) strictly only for the purpose of testing is smelly code. I try to keep behaviour choices as closed as possible and thus do my DI with concrete types when possible with the choice of behaviour being values inside those concrete types.
@chbi
I rarely subscribe after watching just one video, but this one got me instantly! I've seen so many tutorials, but none of them clicked until I found yours. Amazing job—thank you!
@SproutSkout
I am sold when you said "We teach people how to code the right way."
@julieyeaeun
Eric you are an AMAZING teacher! Sincerely, a former teacher turned programmer :)
@RogerDunder
That was the easiest most clear explanation i found so far, thank you so much!
@NiKo-lh2nq
As soon as I opened the video and saw your face sir, I felt overwhelmed by a sense of trust. I immediately subscribed.
@sllkevin8885
Thank you, all others just explain what DI is and you explained perfectly how to use it.
@noobsplain
I have been watching a lot of programming tutorials and this instructor is so very good! Not only the explanation itself, but the cadence is very good.
@stressfreesid9498
I will say you are the great master teacher. You have extra ordinary skills and techniques for teaching lots of blessing from all who watched this videos.
@simonroyjonesuk
Really clear and easy to follow explanation. Thanks very much.
@mrkyaing5456
Cool,Sir. I appreciate it .
@sunghancho7838
Oh wow, this is the best video that explains DI. I've watched a lot of other videos and questioned their lack of explanation or the parts that are missing or don't make sense. I also saw similar thoughts in the comments. But this one, I want to say, is perfect!
@yojackleon
Hands down, best explanation ever ! thank you Eric
@HiwashiYT
What an amazing explanation for a very confusing topic to beginners like myself, you even added the testing example that so many people mention but never show! Great work, will definitely follow your channel for more content.
@christianfredrickgerman9170
Thanks. You explain DI so clear and simple that even non programmer can understand.
@cyfam2700
Absolutely clear!
@PrettyBlueThings
Excellent explanation!
@navjotkaur973
In depth Explanation from a master! Awesome!
@drgothmania
I have to say that every time I read something about dependency injection, I kinda understand a bit of it yet still feel that it's an intimidating concept. But your explanation is so cool and simple. Thank you for making this. I love the example and really want to try it out right now.
@SkillFoundryIO