S.O.L.I.D. | Liskov Substitution Principle feat. Kotlin

Open Closed Principle Video: • S.O.L.I.D. | Open - Cl...
Hello World, this is a practical overview of the Liskov Substitution Principle, as part of the S.O.L.I.D. principles popularised by Robert C. Martin.
Thanks for watching!
Follow me on
Twitter: / konstantinosr92
linkedIn: / konstantinos-reppas-48...

[@ibrahimylmaz8378]

Mister, even though I didn't fully understand a single sentence in this series, this is awesome! Thank you! I'll be re-watching these over and over again. It's a shame that real content creators don't get the credit they deserve.

[@stefdinaki249]

I believe this is the first time I actually sat through the Liskov principle, thank you!
Sound was the same as always for me

[@KonstantinosReppas]

thank you very much, i really appreciate it!

[@mehmoodrehman6336]

Excellent explanation!!!
3) Introduction and explanation 0:00
4) LSP Rules: 6:00
a) Signature Rules: 6:35
i) Method Argument types
ii) Return types
iii) Exceptions
b) Properties 8:30
i) Class invariants
ii) History constraints
c) Method Rules 10:00
i) Preconditions
ii) Postconditions
5) Summary/Recap 11:15

[@KonstantinosReppas]

Really appreciated!!

[@rafaelcagliari6747]

awesome video, just like the rest of the series!

[@KonstantinosReppas]

Glad to hear it! Thank you for your kind words!

[@matt-g-recovers]

Very Nice Kostantinos!
Thanks, dude!

[@MDDanishAnsariDev]

If Square-Rectangle example violates LSP. How can we refactor it? Is it even possible to do so?

[@KonstantinosReppas]

Thank you for your comment!
Well of course we can refactor it, but we would not use inheritance. It's a different shape, maybe we could use a base shape class that simply has number of edges or total perimeter etc, and make rectangle and square a subclass of the base shape class. But we should avoid the inheritance between rectangle and square, the way we would avoid an ellipsis being inherited by a circle for the exact same reasons. They are simply incompatible software-inheritance wise.

[@MDDanishAnsariDev]

@@KonstantinosReppas Got it. Thanks for the explanation sir.

[@Sc2MooDy]

Amazing, thanks!

[@KonstantinosReppas]

Thank you very much! Glad you liked it :)

[@JustTheHighlights]

You might wanna reupload with better sound. The volume is very low compared to other videos.

[@KonstantinosReppas]

Sorry to hear that, but at least at my speakers it's the same volume as before. Will look into it for sure though.

[@JustTheHighlights]

@@KonstantinosReppas Hmmm... for me it's much quieter compared to other videos. I tried on a couple of devices and I can hear the same thing.

[@broncebronce100]

I agree with sound, quite low than previous ones. Great video again

[@KonstantinosReppas]

Thanks for the feedback, will try to turn it louder in the next video. :)

[@kafran]

I agree with the sound. I had to raise the volume from 30 to 80 to get comfortable with this one.