I study and improve not only patterns but also English. Thank you for clearful and not boring lessons =)

It's 2023 and I am watching the series (of course with pen and notebook ready). Thank you very much Chris! The value you add is huge.

I have to admit (yeah I watch it now in 2020) that I really haven't seen any tutorial videos on YT that are as immersive and fun to watch as this one. I am a computer science student that likes to explore CS-related content and I accidentally stumbled upon your channel. I may say that these 25+ min videos are better structured than all the lectures I have attended at my University. Well done! I am a subscriber now! Thanks for creating and sharing this interesting content!

Finally understood the difference between Factory Method Pattern and Abstract Factory Pattern. Thank you very much. Great series!

This is a great video, you covered the pattern very well. I wanted to add one additional point which you will see in many implementations of this pattern: When you have multiple concrete implementations of a factory, you have the same problem you had when faced with multiple concrete implementations of a product. You want to get the type of product you need, but don't want to get your hands dirty with the business logic involved in creating it. With multiple concrete factories, how can you apply a polymorphic solution for creating the correct type of factory? The answer is a factory of factories. The same way we abstractify the logic for creating products, we can abstractify the logic for creating factories that produce families of products. Let's use your operating system example: You want platform-specific UI's, and have created UI factories for Mac OS, Linux, and Windows. Maybe you also have subclasses of those factories for things like light mode, dark mode, accessibility mode, etc. When the program begins, you detect the operating system and graphical settings, and send those details to your factory of UI factories. You are given back the correct concrete UI factory implementation specific to your needs, and can start producing UI elements. Without this extra polymorphic layer, you may be faced with the same problem that the factory pattern was devised to solve.

Please include code examples as they really help cement the idea, like you did in decorator pattern.

The UI example was so much clearer than the Head First pizza examples! This makes sense in a way that I can use it for my own projects, thanks!

Freaking HERO - I have been banging my head against the wall for about 2 hours trying to understand Abstract Factory Patterns and you managed to clarify everything in about 25 min. The recap of the definition at the end really brought everything together. Thanks for helping me not fail my CS course

You got a talent to explaining difficult abstractions. Keep it up, man - result is incredible.

Man, this video series might be ever green when you are done with it! youtube has connected us in an observer pattern in that since I subscribed, I get updates on your current videos :D

The example of Dark and Light mode was beautiful. It gave the most clarity about the use case of abstract factory. Kudos!

The best video that explains Abstract Factory pattern. Very well edited to keep the pace of video fast enough.

Men, Chris, your energy is infectious, lots of love. Thanks a bunch

Posted years ago, yet this one still the best explanation I found so far.. Thanks (a lot) Chris..!!

The explanation that why we go from factory method to abstract factory is what really helped wrap my head around the concept, Thanks a ton!! :)

You have such a great way to teach and keep the user engaged. With the ever important point of the "Why" not just the "How", this video is one of the best in this subject IMO. Thank you very much for sharing!

Literally been trying to wrap my head around the abstract factory pattern for the longest time and your video finally helped me understand what it is and why is is useful!!!!!💯I love your teaching style!!!!! Thank you so much!

We will never understand why you dont upload videos anymore. We would pay you ,just create videos with pay suscription here in KZfaq.

I tried to understand this via wikipedia's diagrams and descriptions, but it was too overwhelming for me couple of weeks ago. And now they are REALLY simple. Great thanks to you, man. You are really sticking to KISS principle :)). thank you again

25:00 really hits the nail on it's head. Thank you for the nice work!

Your explanation is very crystal clear and possesses exact amount of depth which is needed to learn design patterns. I am really enjoying these videos. If you can please try to reduce the joining of different video clips, it will tremendously help in focussing more on the topic as frequent clips somewhat cause a distraction. But yes, this content is GOLD!

Possibly the best explanation I've ever seen. Thank you Chris!

It must be a hell of a feeling to read all these comments and see how helpful you are to others, keep it up please, you are good at this, thank you!

Thank you. Much easier to understand as a visual learner.

You're really onto something with your design patterns series here. Keep on keeping on. I especially appreciate the fact that you compare the implementation to real world applications. For a follow up series I'd suggest revisiting the patterns after a while and focusing on the comments, most common questions, misconceptions, etc.

This is some premium explanation making complex topics simple to understand, and I love the way you repeat things so that the idea gets cemented into our head, hats off to you sir, great explanation I hope you never stop doing these, We novice developers need people like you.. :)

Your teaching is better than all the teachers that i saw in 12 years of studying at Iran awful schools :) love you bro....

You deserve all 3 buttons from KZfaq

By far the one of the best teachers on KZfaq. Thanks

I swear it all made sense with that last themes example. Amazing.

Thanks for the awesome videos! I think the main difference between Factory Method and Abstract Factory is that Factory Method relies on inheritance and let subclass decides how to create object through the factory method(s), whereas Abstract Factory uses composition, client gets an object that implements abstract factory interface and uses that object to create items. Abstract Factory is at a higher level since it is an object, while factory method is only a method.

Your teaching style is so nice and easy. Thanks a lot

Christopher your last example in the video on Mobile App theme is EXCELLENT. It clarifies the real time use of abstract factory pattern and also why we can not use factory method pattern in this example.

Thanks a lot Christopher for the perfect explanation on Abstract Factory and Factory Method pattern. I have seen dozen of tutorials on Abstract Factory pattern but most of them are confusing or miss leading. After watching this video, now I perfectly understood Abstract Factory pattern. Thank You again.

The method you use for teaching is very dynamic, but at the same time through, thanks to that I was easily able to understand the whole concept. Keep it up!

for the arrows it can work if you selected arrows starting from concrete factories from the bottom only heading to product B and another starting points from top heading to productA. Good job you deserve all the good comments.

Estaba viendo videos de este patrón, vi tu video y dije: pues veamos si logro entender después de varios videos y solo te puedo decir que eres un genio explicando. Te estoy enormemente agradecido...

your example of dark theme and light theme of an application is the most make sense of application development. Thank you.

Finally in forver i understood this concept. You are the only i have seen provide a really easy example that is applicable in real life.

invert bottom right stack and draw green lines to the bottom to avoid line crossing, thanks for the videos!

I think you explained the most difficult design pattern in the simplest way. Thanks again :)

Finally watched Christopher video at 1.5x speed. Because I had already watched his previous factory design pattern video :) :P

Yet another awesome video!! When I listen to your explanation it makes me really think as opposed to just be a passive listener. Thank you very much Sir!!

As a novice to design I often have hard time thinking where this thing could be applicable. The example in end of themes in UI was of a great help. Thank you. 😊

Amazing tutorials sir, the best I have ever seen for design patterns, this is exactly what I was looking for. Thank you so much

Wow Christopher.. You are the man!! I tried in couple of other places, but didn't quite grasp AFP. But you made this so simple..! You don't know how thankful I am to you!!

Best series on design pattern👍👌

Very good explanation. We had a deep discussion in lessons yesterday because there was the perception that abstract factories return factories but this was massively helpful.

Hey Chris, nice explanation. Absolutely love your big hand gestures and passionate rants.

Just want to thank you again for this new video. You still doing good job and the draws in the video were very meaningful. I'm surely gonna be design pattern expert at the end of this serie. Cant wait for the next one

You are a very talented teacher. Thanks a lot really

I'm in 5 mins and I think I found the right channel for concepts! Because supposedly anyone can code these days!

I am learning this for the first time and I was so incredibly proud of thinking, damn that would be useful for dark mode in apps or even os. Guess what, took you 30 seconds to say that, I know it's nothing special but it just felt like I was incredibly smart for a second

Thank you Christopher for great explanation.My advise just for videos that all design patterns have some limits.For example when we use abstract factory for different platforms such as for windows and mac and if mac dont have one component which exists in windows it can be problem using abstract factory.so it would be great if you aldo explain some important point that someone should be careful when to use

Thanks for all these videos talking about design patterns. Very good and clear explanation.

I never knew someone with such a great speaking talent man, really really great!

Beautifully explained with good example of UI controls.

The explanation is utterly great! And the final example is way better then any "abstract" pizza factory.

Design Patterns : Never been easier with Christopher Okhravi Thank you sir for your high quality content and especially for your eagerness to make sure that the topics are understandable and enjoyable :)

I'm reading the book and i felt like i drowned in an endless ocean of PIZZAS, and luckily i found your channel and now i'm able to skip the rest of the factory patterns part from the book. That was a great boost, Thank you :D Of course i'll move back and forth between this playlist and the book, it's really helpful

I watched your videos and passed my design patterns Exam with good grade. Thank you so much for such great effort. Stay blessed

You are excellent, Christopher, just brilliant

Just put ProductA & ConcreteProductA on the down left side so to avoid line crossing. I haven't read all the comments, so perhaps that was mentioned before :). Wonderful explanation.

This is top notch stuff. Your viewpoint and how you think about it makes the patterns clearer.

You are an amzing teacher!

I think the concept of Factories finally makes sense to me now. I can see how the process of creation of an object has been abstracted away. However, contrary to what I've read somewhere that it is meant to avoid the 'new' keyword, your explanation makes much more sense. I can see now how one might want to avoid 'new' keyword unnecessarily in order to have dynamic object creation code. Still, it is necessary to understand that you cannot completely avoid the 'new' keyword as the concrete factories themselves must be created at some point in the code. I think the key power of factories is their ability to provide a means of creating and using 'wishful' objects of classes that don't even yet exist in the code. Thanks a lot man.

I am really impressed by your way of teaching Really helped me understand the abstract factory and factory methods pattern Glad I found your lessons on youtube Keep up the good work

u are really genious..... jo aapko ye subject samajh mai aaya

you are the best teacher i have ever seen

Your explanation is brilliant!

Best design pattern tutorial series ever!

Loving these walkthroughs! Perfect for the courses I'm taking that always have very unclear explanations, but where you make it very clear!

Thanks again for the awesome video. I wish I had a teacher like you in university.

What is going on, this guys is way better than my teacher.. Goooooood job, I understand now!!!!!

Your lessons are great! Thank you so much.

I understand this pattern so much better now. Thank you for the great explanation!

the way you speak and present is awesome :) thank you.

I wouldn't really call it simple design pattern. But I can certainly see how valuable it is. Thanks for the video!

This playlist is really good for getting a start in design patterns.

Some examples on the book are rather ambiguous for someone who is new to the concept. Thanks for coming up with more understandable real world examples and analogies.

some heroes don't wear capes. They are giving free knowledge for free with a perfect explanation.

really good explanation on a theoretical level

Dude, you‘re an absolute educational monster. In Uni the reasoning for using composition instead of inheritance was a joke. I mean litterally. The prof cited a joke and that was it. By whatching your videos I am starting to see an actual reason to use composition instead of inheritance. Thanks a lot!

GREAT WORK MATE. You helped me a lot with these patterns, i didn't really understood them until i watched your series..

I love the UI example i.e. dark theme factory vs light theme factory. Really grounds the concept!

Loved the explanation, was struggling with Abstract factory for more than a day...

This video provided us an excellent explanation about abstract factory pattern and the main points of difference between the abstract factory and the factory method, congrats brother. Thank you very much!

Something clicked in my mind while watching this video. Thank you.

Honestly this is the most complicated yet

Well this really sounds like oop concept. Just another way to say. Thx for ur great explanations

Awesome video! I had seen only the factory design pattern videos but I cant wait to see the others! Excellent teacher

Moment when u after reading tones of text, and watching 10+ videos, after single video made by Chris everything makes perfect sence...

you're the best! Don't stop do it!

Another amazing video. Your way of explaining really makes things stick. Thank you! *Edit: and please don't listen to people saying you repeat yourself or overexplain things. In the first vid I kinda had the same feeling. But then i realized that's part of the genius and why, at the end of the video, everything is so clear! :)

Super clear explanation! Thank you!

hey, first of all thank you for the wonderful explanation,especially the example of light and dark theme icons.. i have read the chapter from book and i must say they really complicated the example in that

Thanks for wonderful video. It helped to understand the difference of Factory Vs Abstract Factory clearly.

Summary: Factory Pattern - can only create 1 concrete product. Abstract FP - can create multiple concrete products (related to each other - or family of products). That is it. Both are FP because they let its subclasses decides the concrete implementation. It took me 3 weeks of reading the book, watching videos to the point everything just click (embarrassing, I know ). So believe that you will eventually understand it.

Crisp, clear and to the point. For the UML diagram, checkout the one from GOF (Design Patterns : Elements of Reusable Object-Oriented Software)

Thank you for making the understanding so easy.