I honestly believe that everyone having troubles to understand relationships should watch this video. It helped me a lot! Thank you
@shikhaagrawal3779 Жыл бұрын
😊
@user-xm8bq8do4r10 сағат бұрын
Excellent video! What a clear and concise explanation of the three concepts! Thank you. Keep up the great work.
@zladtv14569 ай бұрын
I have been trying to understand where to use associations by watching tutorials for an hour and 10' now. Finally I understand. Thank you!
@musabansari86076 ай бұрын
Maybe the best content on this topic in the entire youtube. Very Comprehensive Video. Thanks Geekific.
@yasukunijinjatoilet6 ай бұрын
I believe there is something wrong with the object diagram show case appers at 9:26 regarding to the relationship directions between subaccounts and bandaccounts.
@aulerleandro6 ай бұрын
I also noticed, small mistake
@geekific4 ай бұрын
Yes! It is noted in the description, sorry about that.
@yasukunijinjatoilet4 ай бұрын
@@geekific Nice. Thanks for the well designed tutorial!👍
@raywong9832 Жыл бұрын
The video clearly explained how the association relationship evolved into aggregation and association relationships, and the drawing of the symbols, and the difference between class and object relationships. I watched many videos before and read a lot of articles, but each time I got more confusion as I watch/read, very frustrated. finally, I got it all figured out. To make your video more complete, it would be nice if you could add some real code along with the video. After all we want to code. Thank you.
@_rtdp_ Жыл бұрын
This is the only video lecture where I clearly understood class relations 😭😭😭... Thank you very much ❤️❤️❤️
@jorgepinilla549423 күн бұрын
greatest video of uml class model
@4thehood2 ай бұрын
This is really helpful video to understand the difference between the relationships of classes. Watched so many videos before this one, but this is the best match!! MUST WATCH!!!
@vengateshm21223 жыл бұрын
10 minutes of effective knowledge. Thanks to you and KZbin algo for bringing your videos to me which keeps me updated with these information.
@geekific3 жыл бұрын
So nice of you! It's my pleasure man :)
@willft5202 жыл бұрын
On the last example at 9:09, there's a mistake on the relationship between the SubAcnt and the SavingAccount objects as the SubAcnt objects appear containing the SavingsAccount object, but it should be the other way around, with the filled diamond on the SavingsAccount side.
@geekific2 жыл бұрын
Yup, thanks for sticking till the end! Was mentioned multiple times in the comments :)
@willft5202 жыл бұрын
@@geekific Thanks for the reply and, of course, for the content of your video! I like very much the way you explain things! Sorry I wasn't careful enough to check if there was any comment on that error, I did a quick search and didn't see anything about that loaded on the top comments at least so I decided to leave that message. I've been researching this topic lately, I've learned a lot and redefined many concepts I thought I understood already.
@geekific2 жыл бұрын
I am so happy you found our videos helpful :) On the contrary thanks for mentioning it, you're helping a lot :D
@sadam_khan2 жыл бұрын
Like trump says, it was the best of the best tut on this topic. Finally grasp the concept with clarity.
@BashithaShamila4 ай бұрын
you have the best teaching skill among the youtubers i've watched , keep it up bro ....!
@nickpratt9338 Жыл бұрын
Best explanation I've heard on this topic. I don't think ever really understood it until now.
@FredBwalya-ge5fr3 ай бұрын
Very helpful video. I watched it once and got the concept.
@anderskristoffersen3270 Жыл бұрын
Why do the diamond arrows point in different directions in classes (6:30 min) and objects (9:20 min)?
@geekific Жыл бұрын
Are you referring to the "correction" mentioned in the description?
@asiframzan4378 ай бұрын
This is an amazing explanation, and the result is that I'm able to highlight a mistake in the Object Diagram when aggregating SavingsAccount to SubAcnt. In fact, the diamond shape must be towards SavingsAccount because this SavingsAccount is a container for SubAcnt, just like Customer, which is a container for BankAccount. Regards
@flpflpflp2 жыл бұрын
Thank you for taking the time to record this. It was really helpful.
@stephenkiss46143 жыл бұрын
Great content! Are the composition associations from the SavingsAccount to the SubAcnt backwards? I thought the filled in diamond node at the end of the association was supposed to be connected to the more generalized container
@geekific3 жыл бұрын
Thanks :) Ohh, at the very end in Object Diagrams, it's direction should be exactly the way it was while explaining Class Diagrams. Kudos to you, well done
@braineedly75432 жыл бұрын
7:50 How on earth Customer have relation and knowing when Bank Event without have anything about Bank Event?
@romankost88282 жыл бұрын
Super explanation with the much needed humor!
@geekific2 жыл бұрын
Glad it helped!
@yogeshkumargupta2652 жыл бұрын
I learnt about a dotted line notation with open arrow at the end, which denotes dependency. I am unable to understand what is the difference between dependency and association. Like, With your example, Customer class has a method for subscribing to BankEvent. So Customer has an association with BankEvent, at the same time, Customer is dependent on BankEvent. Isn't that always the case????
@geekific2 жыл бұрын
Good question! A class is associated with another whether it has it as an attribute / property or no. If it is an attribute, then it either falls under aggregation or composition as explained in the video, if not (if it is only used as a method parameter or return type etc.) then it is a dependency. Hope this helps :)
@kzvlogs7186 Жыл бұрын
Thank you for explaining so clearly.😊
@SrinivasNirvana5 ай бұрын
I have a different opinion that except inheritance others like association aggregation and composition talks about object relationship. Where Inheritance is all about relationship between classes.
@dddd-ci2zm Жыл бұрын
Excellent! This is the best description of the arrows~
@Aughadi2 ай бұрын
By hierarchical relationship sub class can not exist without super class it is same as composite aggregation ???
@trilecao9014 Жыл бұрын
Thank you so much. It helps me have a clear understanding about relationships.
@swarnas23132 жыл бұрын
Wonderful explanation 😄. Keep producing more of these content with us 💟
@abhilashpatel6852 Жыл бұрын
This is gold.
@sarthakgiri4596 Жыл бұрын
wow literally wonderful
@krzysztofskibniewski5608 Жыл бұрын
Great video 👍, it explained a lot to me, but I miss converting UML to code to see what the code looks like digested with such a diagram.
@geekific Жыл бұрын
Thanks! Great idea, will try to cover it in an upcoming video :)
@saadfarraj56563 жыл бұрын
you are really doing a good job here .
@geekific3 жыл бұрын
Thanks a lot! Glad it was helpful!
@ashrafalz75992 жыл бұрын
u just helped me to pass my test.....thanks alot !!!
@geekific2 жыл бұрын
Glad I could help! All the best :)
@KizilBoss10 ай бұрын
Thank you for the great video. I am struggling with the banccount class and the subclasses. As you did the object diagram there was no bank account obejects only savingaccoubt and milesaccount object. Is backaccount an interface or abstraxt class? Customer has a list of Bankaccoubt how it will work with saving accounts and milesaccount because its not the same type. I am honest great uml explanation but i am confused af 😢. Can you explain it? I would love it if you could explain whrn to use inheritance or Interface? Thank u Update: ok, Bankaccoubt is an abstraxt class so we can create instance of the the inplementation as Saving Account and Milesaccount. Can we use only base and subclasses instead of interface and implementing classes? Plz do an video 😵💫 I am for the first time really confused.
@geekific10 ай бұрын
Can you please clarify as to what is the confusing part exactly? Is it the difference between abstractions and interfaces?
@KizilBoss10 ай бұрын
@@geekific yes, thats the first Question, second is what if we use only inheritance for bankaccoubt and the subclasses? Will it work? If not what is the scenario of using inheritance and not abstraction? Thanks
@williamaditama13526 ай бұрын
In the last object diagram, aren't the composition arrows inverted?
@geekific4 ай бұрын
Yes! It is noted in the description, sorry about that.
@MuhammadUsmanQasim-es8fm Жыл бұрын
You're a life saver bro 🙌
@doriansmith5667 Жыл бұрын
Thank you. Blessings
@scarlettefoxx55852 жыл бұрын
Thanks for helping me with my software technology program
@geekific2 жыл бұрын
Glad I could help :)
@user-dd1io8zj5e10 ай бұрын
When Object diagram is formed, where is Bank aount lass is gone? WHY is it not there in Objet Diagram
@geekific10 ай бұрын
Because you create objects based on implementations and not abstractions!
@oleksandrsmyrnov8295 Жыл бұрын
Thanks for the video. But regarding that association between BankEvent and Customer. Point is why did you decide to relate BankEvent to the Customer at all? I would create a Bank - class and relate it to the Bank (as a composition, cause event can't exist without a bank).. For me the question of necessity of having an "association" option remains unclear. Could you make maybe another example where havng "association" in unavoidable?
@geekific Жыл бұрын
Thanks for the feedback, well received! We will try to answer these concerns in future videos. Stay Tuned!
@ug_it_english2 жыл бұрын
very helpful for concepts on UML class and object diagram. I wonder how to represent method in object diagram, kind of value of method!
@geekific2 жыл бұрын
Glad it was helpful!
@IsaacC204 ай бұрын
Multiplicity wasn't explained very well. Allow me to clarify: The multiplicity attached to each class indicates how many instances of that class can be aggregated-by/composed-by/associated-with a *single* object of the other class. For example, the relationship @4:53 says two things: (1) "0...N BankAccount(s) can be aggregated by each single Customer object" and (2) "There is exactly 1 Customer object for each single BankAccount object". Similarly, @7:23 (1) "0...N BankEvent is associated with a single Customer object (i.e., a Customer can attend 0 or more BankEvents)" and (2) "0...N Customer is associated with a single BankEvent (i.e., Each BankEvent can have 0 or more Customer(s))"
@Manojshankaraj3 жыл бұрын
Really amazing job with the explanation!
@geekific3 жыл бұрын
Thank you! Glad it helped!
@azurtle Жыл бұрын
shouldn't the object diagram at 9:18 be bankAcc: milesAccount not milesAcc : milesAccount?
@geekific Жыл бұрын
Thanks for pointing that out! This was actually mentioned as part of the description! Cheers :)
@kendellferguson50212 жыл бұрын
my university lecturer is great but you really helped me understand this more
@geekific2 жыл бұрын
Glad I could help! :)
@sultanahmadsabawoon60302 жыл бұрын
You're one of the very few people who admired the university lecturer along with the channel. That's nice!
@ahmedkhaled88255 ай бұрын
nice one
@desboom78902 жыл бұрын
Great video. I have a question regarding aggregation. So how do we determine the place of the "diamond symbol"?. If the diamond is placed at the "customer class", does it mean that a customer has a bankaccount or a bankaccount has a customer? It is probably a bad example here since both things are possible...
@geekific2 жыл бұрын
Thanks! The "diamond symbol" is usually placed on the container class. Hope this answers it!
@desboom78902 жыл бұрын
@@geekific yeah. Thanks!
@dukkanchocolate77542 жыл бұрын
ياعم انت جامد ياعم♥️ Thank you
@geekific2 жыл бұрын
Thanks a lot! Glad you liked it :)
@kbpmowrya Жыл бұрын
Seems direction of subAccount direction might be pointed opposite in the Object daigram. Please correct me if i am wrong
@geekific Жыл бұрын
Mentioned in the description!
@kbpmowrya Жыл бұрын
@@geekific Thanks
@dikshyantauprety40202 жыл бұрын
Thank you so much, very clear explanation
@geekific2 жыл бұрын
Glad you liked it :)
@mohammeds63142 жыл бұрын
keep going , perfect explanation, thanks a lot
@geekific2 жыл бұрын
Thanks, will do! Glad it was helpful :)
@andreilauran75132 жыл бұрын
Hi, cool video. I have one question tho: shouldn't it be a dependency relationship between Customer and BankAccount instead of an association one?
@geekific2 жыл бұрын
Thanks! Can you please elaborate? It is already set as an aggregation in the video.
@andreilauran75132 жыл бұрын
Oh sorry, i meant BankEvent, not BankAccount.. didn't notice
@sakshamchhabra1175 Жыл бұрын
How can bank account exist if there is no customer?
@geekific Жыл бұрын
You are thinking about it from a real-world perspective, in the video we are doing this from an implementation / a technical perspective.
@mahrou616 Жыл бұрын
nice explanation!
@zsoltfehervari6252 жыл бұрын
The direction between subaccount and account is different in the two models...isn't it?
@geekific2 жыл бұрын
Yes it is, in the object diagram it is switched, I can't fix the video but because it is not the first comment addressing this, I will add it as a note in the description :) Cheers!
@braineedly75432 жыл бұрын
7:50 How on earth Customer have relation and knowing when Bank Event without have anything about Bank Event?
@geekific2 жыл бұрын
There is a relation between the two as action is being taken by the Customer when provided with an Event, so, it does know stuff about the event and act upon them but it is not storing these event, it is not a *container* for these events and hence it is not an Aggregation, that was the whole point :) Hope this answers your question!
@habibdeleonbanos81962 жыл бұрын
Great! Thank you so much
@geekific2 жыл бұрын
Glad you liked it :)
@mehdi-vl5nn2 жыл бұрын
perfect explanation
@geekific2 жыл бұрын
Glad you think so!
@mehdi-vl5nn2 жыл бұрын
@Geekific on second thought about the last example, is not right eventually we have to break down many -to -many to one- to -many and we need a middle table
@geekific2 жыл бұрын
@@mehdi-vl5nn You are thinking about it from a DB perspective! But to answer your question, the relation between the middle table and each entity in this case will be one to many, but what about the two outer entities linked via the linking table? it is still a many to many, and that is what we are trying to explain here:) Hope this helps! Cheers!
@ollysalanson94522 жыл бұрын
Thank you so much!
@geekific2 жыл бұрын
No worries! Glad it helped :)
@sipintarpatrick2 жыл бұрын
nice video sir, thanks
@geekific2 жыл бұрын
Glad I could help!
@sanjusk42873 жыл бұрын
great thank u
@geekific3 жыл бұрын
Thanks! You're welcome :)
@user-yd9xy3rb4x2 жыл бұрын
Cool, man.
@geekific2 жыл бұрын
Thanks!
@saweranabi77862 жыл бұрын
Thank you
@geekific2 жыл бұрын
My pleasure :)
@besz.1218 Жыл бұрын
magnifique
@zezo9282 жыл бұрын
In many to many association do we need to Define a new class?
@geekific2 жыл бұрын
Hello :) Am not sure I really got your question, can you please rephrase it? Sorry.
@vikasa63312 жыл бұрын
Tooo much confusing honestly .....
@geekific2 жыл бұрын
Sorry to read that :/ I'll be more than happy to answer any question you may have in the comments section :) Do you mind pointing which parts/topics specifically were confusing to you so we may improve it in future videos? Thanks for your feedback :) Cheers!