this is no joke, this guy articulates words with speed of a Gatling gun and yet he's perfectly understandable. not even a single word gets ambiguous or hard to catch!
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!
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.
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
concrete factories, cement, did i accidentally walk into a construction supply shop or something? lol. but yeah, i agree, code examples would be pretty helpful.
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
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
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!
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!
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!
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!
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.. :)
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.
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.
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.
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.
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.
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!!
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...
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!!
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.
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
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. 😊
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
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 :)
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
Great point and great advice! :) The Interface Segregation Principle (which states that: "no client should be forced to depend on methods it does not use") is another way of expressing the very important point that you raise. It applies beyond AFP but perhaps as you allude to especially in AFP since it's easy to get caught up in the moment and just through every conceivable method into the factory :) Thank you for sharing and thank you for watching :)
I think all design patterns have limitations in general, that is why you will see some element of implementations of minor aspects of other design patterns in conjunction with another design pattern. For instance, its quite common to see Factory pattern being used in conjuntion with Prototype pattern or storing some set of prototypes...There is no really a silver bullet to all programming problems.
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
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!
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!
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
A friend and I wrote custom game engine a while back ago. It supported DX9 and OpenGL. I really wish I had thought of this when creating resources. We used a more traditional Factory Method approach which made it possible to share resources from different graphic APIs. So you had to be really careful which you used. Abstract Factory probably would have made this better. Thanks for the video!
Fantastic series of lectures... Really appreciate the efforts taken to bring out the essence of each pattern... The key I think is the problem, solution definitions and the relatable examples... Kudos
I've a good example that you can use to explain this pattern: If you make a nature simulator that creates animals and environments for them you can use abstract facory pattern to create a factory the makes combinations of different animals and environments. one concrete factory can create combination of arctic animals and arctic environment, and other can create a combination of desert animals and desert environment. if you try to combine arctic animals and desert environment it doenst make sense. I hope it helps :) (Btw, continue making your awsome videos!)
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.
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
Couple of years ago I had made an android application using a "simple factory", but I thought that I used a "Factory Method". And now I have finally understood that actually I should use an "Abstract Factory". Few types of workout that contain different sets of exercises.
I study and improve not only patterns but also English. Thank you for clearful and not boring lessons =)
Thank you for the kind words and for watching :)
I also improve patterns and English... you said why.. Well because We're learning English -__- xD
this is no joke, this guy articulates words with speed of a Gatling gun and yet he's perfectly understandable. not even a single word gets ambiguous or hard to catch!
LOL😂
Хорош
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.
The example of Dark and Light mode was beautiful. It gave the most clarity about the use case of abstract factory. Kudos!
Happy to hear. Thanks for watching 😊🙏
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!
I'm glad to hear. Thanks for sharing :) and thanks for watching :)
It helped me also :)
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!
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.
I love it when people write down what I'm saying in my head, makes me feel connected to the world somehow. :)
Thanks for sharing your knowledge. :)
7 years later, this series is still the best for learning design patterns.
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
Please include code examples as they really help cement the idea, like you did in decorator pattern.
Second this. I know this is about abstraction but man.. the example is too 'abstract'.
Watch Derek Banas Vidoes on Design pattern after every explaination.
@@kapilpadaliya2387 thanks. Derek's demonstration really helped me
check out this video For amazing content with code Example nicely presented ua-cam.com/video/Mz3y-s1jkkE/v-deo.html
concrete factories, cement, did i accidentally walk into a construction supply shop or something? lol. but yeah, i agree, code examples would be pretty helpful.
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
+tivmego haha thanks! Makes me glad to hear :) Thanks for watching :)
lol
I need to subscribe too! I was constantly polling his channel for new videos like a scrub
You got a talent to explaining difficult abstractions.
Keep it up, man - result is incredible.
The best video that explains Abstract Factory pattern.
Very well edited to keep the pace of video fast enough.
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!! :)
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
Posted years ago, yet this one still the best explanation I found so far..
Thanks (a lot) Chris..!!
Men, Chris, your energy is infectious, lots of love. Thanks a bunch
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!
I swear it all made sense with that last themes example. Amazing.
I’m glad to hear! That’s awesome. How lucky 😊😊 Thanks for watching 😊
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!
we love the jump cuts
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!
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!
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 example of dark theme and light theme of an application is the most make sense of application development. Thank you.
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!
By far the one of the best teachers on UA-cam. Thanks
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.
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.
You deserve all 3 buttons from UA-cam
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.
I'm in 5 mins and I think I found the right channel for concepts! Because supposedly anyone can code these days!
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.
Beautifully explained with good example of UI controls.
Your teaching style is so nice and easy. Thanks a lot
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.
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.
25:00 really hits the nail on it's head. Thank you for the nice work!
Possibly the best explanation I've ever seen. Thank you Chris!
I think you explained the most difficult design pattern in the simplest way. Thanks again :)
Thanks for all these videos talking about design patterns. Very good and clear explanation.
Your teaching is better than all the teachers that i saw in 12 years of studying at Iran awful schools :) love you bro....
Thank you. Much easier to understand as a visual learner.
some heroes don't wear capes.
They are giving free knowledge for free with a perfect explanation.
Haha 😊 Thank you very much for these words. It makes it all worth it 😊😊
loved the way this guy explains. Nice
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!!
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...
I love the UI example i.e. dark theme factory vs light theme factory. Really grounds the concept!
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!!
invert bottom right stack and draw green lines to the bottom to avoid line crossing, thanks for the videos!
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.
The explanation is utterly great! And the final example is way better then any "abstract" pizza factory.
This is top notch stuff. Your viewpoint and how you think about it makes the patterns clearer.
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
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. 😊
I wouldn't really call it simple design pattern. But I can certainly see how valuable it is. Thanks for the video!
Moment when u after reading tones of text, and watching 10+ videos, after single video made by Chris everything makes perfect sence...
+cunami2 haha :) Thanks I'm very glad you feel that way :)
Amazing tutorials sir, the best I have ever seen for design patterns, this is exactly what I was looking for. Thank you so much
This playlist is really good for getting a start in design patterns.
I never knew someone with such a great speaking talent man, really really great!
I understand this pattern so much better now. Thank you for the great explanation!
Loved the explanation, was struggling with Abstract factory for more than a day...
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
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 :)
Awesome video! I had seen only the factory design pattern videos but I cant wait to see the others! Excellent teacher
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
Great point and great advice! :) The Interface Segregation Principle (which states that: "no client should be forced to depend on methods it does not use") is another way of expressing the very important point that you raise. It applies beyond AFP but perhaps as you allude to especially in AFP since it's easy to get caught up in the moment and just through every conceivable method into the factory :) Thank you for sharing and thank you for watching :)
I think all design patterns have limitations in general, that is why you will see some element of implementations of minor aspects of other design patterns in conjunction with another design pattern. For instance, its quite common to see Factory pattern being used in conjuntion with Prototype pattern or storing some set of prototypes...There is no really a silver bullet to all programming problems.
GREAT WORK MATE. You helped me a lot with these patterns, i didn't really understood them until i watched your series..
Best design pattern tutorial series ever!
you are the best teacher i have ever seen
Loving these walkthroughs! Perfect for the courses I'm taking that always have very unclear explanations, but where you make it very clear!
Finally watched Christopher video at 1.5x speed. Because I had already watched his previous factory design pattern video :) :P
I watched your videos and passed my design patterns Exam with good grade. Thank you so much for such great effort. Stay blessed
That’s awesome! Congrats! 🎉🎊
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
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!
Best series on design pattern👍👌
You are excellent, Christopher, just brilliant
Your explanation is brilliant!
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!
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
the way you speak and present is awesome :)
thank you.
Thank you very much. I appreciate it :) And thank you for watching :)
Something clicked in my mind while watching this video. Thank you.
I love this series, thanks for your super clear explanations. I'm a fan of the jump cuts, they keep my mind from wandering.
Just love the way you teach dude
A friend and I wrote custom game engine a while back ago. It supported DX9 and OpenGL. I really wish I had thought of this when creating resources. We used a more traditional Factory Method approach which made it possible to share resources from different graphic APIs. So you had to be really careful which you used. Abstract Factory probably would have made this better. Thanks for the video!
Fantastic series of lectures... Really appreciate the efforts taken to bring out the essence of each pattern... The key I think is the problem, solution definitions and the relatable examples... Kudos
Thanks again for the awesome video. I wish I had a teacher like you in university.
You did God's work by making these videos! May you get rewarded for it.
You are a very talented teacher. Thanks a lot really
Thank you for making the understanding so easy.
I've a good example that you can use to explain this pattern:
If you make a nature simulator that creates animals and environments for them you can use abstract facory pattern
to create a factory the makes combinations of different animals and environments.
one concrete factory can create combination of arctic animals and arctic environment,
and other can create a combination of desert animals and desert environment.
if you try to combine arctic animals and desert environment it doenst make sense.
I hope it helps :)
(Btw, continue making your awsome videos!)
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.
Watched the entire series and I had to subscribe to your channel.... easy to understand and you give great examples. cant wait for the next video!!!
CHRIS! your courses are the best for developers who want to take it to the next level. maybe next you can do SOLID with whiteboard?
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
Couple of years ago I had made an android application using a "simple factory", but I thought that I used a "Factory Method". And now I have finally understood that actually I should use an "Abstract Factory". Few types of workout that contain different sets of exercises.
Beautiful. Wish I knew about this video back when I was in college.
Thanks for wonderful video. It helped to understand the difference of Factory Vs Abstract Factory clearly.
u are really genious.....
jo aapko ye subject samajh mai aaya