Dependency Injection & Inversion of Control

[@TheSimpleEngineer]

What do you guys want to learn next?

[@stephane3115]

everything that is not language specific (Design patterns, SOLID, etc..)

[@TheSimpleEngineer]

@@stephane3115 Cool. I'll probably do a SOLID overview video and then separate deep dives like this one in a mini series! Thanks!

[@stephane3115]

@@TheSimpleEngineer Sounds awesome! Looking forward to it!

[@ilyasselamrani5674]

Dude, I just wanted to let you know that your explanation is so FREAKING awesome, I dont why you have such few views, just keep up the good work, you gonna make it. Hard luck P.S.: I would love to see some generic videos about concepts that every software engineer should know

[@ishandulet4289]

too fast, 40% not clear

[@laurentiuanghel1562]

Finally a dude that explains the basic concepts and then actually shows the practical use.. congrats my dude.

[@Ajekiy]

After a few hours of watching videos and reading articles, this has finally made the bulb of my brain turn on and understand exactly what IOC and DI are. The fact that you uploaded this a little more than a month before I needed it makes it even more amazing to me. Thanks a lot, buddy!

[@amanbhatia7442]

Fantastic explanation! So many DI and IOC explanations, but none of them seemed to convince my logic. Your video made the concept so easy to understand. Thanks

[@TheSimpleEngineer]

Glad to hear!

[@pablogarin]

Dude, congrats... I've watched about 10 IoC or dependency injection videos, and this is the most comprehensive one yet... Cheers!

[@calvinsaxon5822]

Thanks for not spending 45 minutes on an introduction at the preschool level to what the concept of "depending" means in life in general. Much appreciated. You got right into the meat while still going at a level a beginner could understand. Much appreciated.

[@ceki9900]

I watched tutorials, read books, followed documentation, but this fit me so well. Thank you very much! People could learn a lot from you in one day a lot.

[@kaizer-919]

I was very confused with this IoC concept and watched many videos on KZbin and nobody explained it better than you. I wish I could give thousands of likes to this video.

[@koushikrakib7605]

Oh man, I watched my instructor's video 3 times, didn't get the concept. But you made me understand everything within 8 minutes. I think the way you code and shows example is really helpful. Hats off!

[@ajay1124]

Easily the best explanation I have seen, simple, succint and thorough - well done

[@TheJaguar1983]

One of the issues I've found with Dependency Injection is that, if you are coming into DI code that someone else made, it can be difficult to find where the injected objects are defined/created/initialised/etc. The main issue is that the code becomes less linear, so tracing through to find the origin point when you need to modify or maintain it can be a real pain.

[@sristijaiswal1013]

After hours of wasting my time on different articles and videos, I finally understood from this video. Thanks a lot.

[@sk8leesk8]

I've listened to other people explaining this topic. You've had the best, easiest to listen to explanation. Thanks

[@MinhalNadeem]

Finally someone explained DI in a very practical and simple way. Thankss!

[@adeyemiblessing]

Been watching videos about dependency injection for the last few days and I never quite understood it like you just explained. I'm really glad KZbin algorithm listens to my wants. You just earned a sub

[@dreamsanity34]

Damn, I've been using Java for over 7 years now and I haven't fully grasped Dependency Injection/Inversion of Control until I found your video. I just discovered your channel and this video and it is very simple to understand. I think you are on par or might even be better than JavaBrains. Definitely, better than other KZbinrs who teach Java technologies and tools.

[@TheSimpleEngineer]

Thanks for the kind words.

[@appyolala]

I've been searching & watching videos about DI. This is the best so far!!!? You've got a gift of teaching!!! Thank you very much!!!

[@rajibsarker3729]

thanks for showing the problem with constructor injection. 😊

[@stefanoctaviansterea1266]

I can't believe I watched a lot of videos about DI and IoC in Laravel and still couldn't understand the concept and now I find your video about the same concepts in Java and it's all crystal clear out of a sudden. Your explanations were so good. Thanks a thon!

[@ashanlingam312]

you are an amazing teacher with great pace and tone of voice and you really know how to communicate important information in a simple easy to understand way. thank you!

[@BabaDee08]

This is the best video explanation for IoC, dependency Inversion principle and dependency injection. 👏👏👏✌️

[@vincez691]

I have spent literally years trying to find a decent video or article to understand DI. This is it right here, the explanation just makes sense

[@weisjerry]

Excellent. In 10 minutes I went from being almost clueless about dependency injection to having a basic understanding.

[@rajnishtiwari1227]

Still after 3 years its most relevant video on this topic. Kudos from India.

[@prabhatracherla3098]

I don't know Java much, I just wanted to understand the principles of DI. And you nailed it. Crisp, fast, to the point. Kudos

[@adeizayusuf]

This is the best video on IOC I've seen on KZbin.

[@FritsvanDoorn]

Thank you for this explanation. I did not understand this concept until you talked about the usage of unit testing and then the quarter fell. Thank you.

[@dibyanshumishra3536]

The best tutorial on Dependency injection yet! Seems to tackle every "why" regarding the topic. A suggestion: You could have had a class that creates the object(initializes database) and return the object before going into the framework section. The most perfect explanation on the internet.

[@yoshihitotuba]

It was extremely easy to understand. It's an excellent lecture! Thank you!!

[@marksimpson4310]

I watched quite a few videos before I found this gem. Thanks for keeping it simple

[@nabidulalam6956]

Best video in yt on Dependency Injection & Inversion of Control.

[@thedeveloper643]

Perfect explanation for DI! Love from South Korea

[@okeuwechue9238]

Very helpful vid. Thnx. @8:50, the issue you introduced - of having 2 databases - can easily be resolved by employing a façade instead of DI.

[@jetgens]

Dude. You blew my mind with how simple you made this.

[@aliraza9511]

Men your voice is very clear, to be honest everything was just clear! very good understanding

[@kenmtb]

This is gold. Thank you for showing your teaching skills and makings a concise no nonsense video. This is the way to learn a concept.

[@GammaSouljah]

Im learning C# and Dependency Injection but was confused by some of the video on youtube specifically targeting c#. I stumbled on to your video and you made the concept so Clear! Thank you!

[@malvaloca]

What an amazing and clarifying explanation. Thanks you all so much!

[@Ryan-hk5yb]

Watching this 5 years later, still a fantastic video

[@irfaanjamarussadiq5500]

This really is the best explanation of DI and IOC I have seen yet! Your explanation was very easy to understand!

[@steambassador]

Finally, today i have understood IoC explicitly!!! yes you are a gooood lecturer!

[@j.johnmario8369]

The BEST explanation of DI on KZbin

[@rajatverma1688]

Lucky to find this video, whenever I need to revise DI, IoC I prefer this one, it's simple, crisp, and clear. Thanks a lot :)

[@recepcakir4866]

This is the best and greatest explanation on all over the internet!! After spending hours trying to learn this s*it I've finally found you. Thanks a lot!!

[@soumenr2168]

This is a great DI explanation with Realtime example ! Thanks Ryan for sharing a great content. 🤟❤ Automatic dependency part is really helpful since it reduces manual dependency injection

[@harshadmanglani1309]

This was fantastic, the easiest explanation for DI ever!

[@xIncrement]

Very nice! Keeping it simple. I've watched multiple videos on the subject, but your explanation condensed the answer to "why", which helped me a lot to start using the principle in practice, so thanks a ton!

[@cannonkalra7133]

This was amazing. It just explained everything I had my doubts about.

[@randomite]

Good illustration. I liked how the debases are initialized in some global space outside the hand coded application.

[@hervelabrie-durand4574]

Good explanation, I did not understand IoC and DI before watching your video!

[@iubob98]

holy shit. I have not found such a good explanation of this concept on youtube. I have given up on those 2 hour tutorials, i just needed a high level explanation. This should've have more views!

[@sabita1225]

this is so good very clear explanation for IOC and DI, the example is pretty straight forward and simple to understand for beginners with no knowledge of spring, thank you!!

[@TheSimpleEngineer]

Thanks! Glad you enjoyed it

[@riyanshbiswas]

By far the best explanation for IOC and Dependency Injection. All other channels complicate that stuff. Much appreciated. Subbed your channel as well.

[@chaluri]

Best lecture I seen about this topic.

[@BuffaloCanCode]

Nothing can be better than this. As a crash course I used to see this video :D

[@ThefamousMrcroissant]

I'm no Java developer, but I found that most of the OO-related terminology used turn out to be things I'm already familiar and accustomed to but simply didn't know the official descriptions for. This is also by far the best description of either concept I've come across thus far. Wikipedia tends to be way too bloated for me to chew through.

[@ayoubdkhissi]

this explanation couldn't be better!! thank you

[@talesrodriguesjardim5088]

AMAZING! You just turn my brain to another level. Thanks! and keep doing your videos

[@srch100]

Second time I search for something that leads me to this Channel. Subscribed

[@babnishvyas6317]

Wow what a wrap-up! Explaining beautifully from the beginning and connecting it to Spring seamlessly! Amazing Stuff:D

[@jgabrielmiranda]

You did very well in this explanation. Tks! I was reading lots of docs here and you could explain in 10 minuts. (btw, sry about my english, it's not my default language)

[@alexdomenici8503]

Straight to the point and very well done. You could also post the first 7 minutes (7:05) as a separate video and that will make an excellent introduction to the concepts of IoC and dependency injection, regardless of one's technology of choice. I'm definitely subscribing :)

[@tzuyulk]

Thank you! I’m a complete beginner and I was having really hard time understanding what ioc is about. Your explained it so clearly.

[@kamikaze9785]

I still don't understand i think i am dumb

[@moisescruz4499]

The best explanation of these two very important concepts. Thank you Ryan

[@beezow7113]

I love the lamp analogy. I am stealing it.

[@divyanshverma2424]

By far the best explanation. which I was struggling to understand.b Thank you.

[@theUSpopulation]

Thank you for this! I had to look into these for a job interview and this video is way more comprehensible than my college notes! haha

[@Rochal147]

Thanks to you and your simplest examples to understand this concept.

[@slobodanbulatovic5300]

By far the best use of code to explain this concept! Thank you !

[@BlazedOutTurtle]

I'm currently learning Spring without much direction into why things are done the way they are in the framework, but your 10min video managed to explain a lot of that for me, Thanks !

[@TitaniumTronic]

Hows it going? I'm trying to learn too but havin issues 😭

[@BlazedOutTurtle]

@@TitaniumTronic At the time I commented I was just starting my new job, safe to say the best way to learn is by building projects, my learning capacity expanded drastically once I was thrown into building things with deadlines. What are you having issues with ?

[@saisrikar7987]

Straight to the point and no nonsense :P

[@jith334]

Finally I am able to feel the real benifit of doing this after hearing these terms repeatedly for over a decade

[@andysierra5141]

perfectly explained, even for non-english speakers. thanks a lot

[@mohammadyahya78]

Yes. I still don't understand how inversion of control makes it easy to unit test the code?

[@TheSimpleEngineer]

Think about mocks. You can instantiate objects or call methods by passing in mocks. Without DI, the real implementation would exist within the function (which you may not have in a testing environment!)

[@ewaldschulte6529]

Great video, just what I needed in the state i'm in. But I think, watching this video only really helps when you already have an idea of the concepts. That's how it was to me. Before I watched the SOLID principle of Uncle Bob (a really good and entertaining video) but he has a very much more high level approach on it, looking at it from the business side (which we devs like to black out as often as possible :-))))) ), and your video directly afterwards , with this straight to the point and practical approach, was a perfect combination

[@aayushsarikhada6]

really informative video ryan, but i didnt understood after 8:40 if someone can explain it would be a blessing thank you.

[@utsavprabhakar5072]

Discovered you on 15th Jan 2021. this year will be good, unlike 2020. thanks for the best explanation of DI and IOC

[@thegt]

Beautiful explanation and comfortable demonstration! Thanks!

[@Bristerireland]

Awesome, thanks! Something went click, finally!!! Been struggling to understand dependency injection and IoC up until now

[@Deekudla]

Which IDE you have used ? Visual CODE ? If yes, Does it support .net console applications ? I thought CODE is for only .net core ?

[@Merserissugoi]

ive been looking everywhere to understand this concept. this was so well explained.

[@TheSimpleEngineer]

Sweet

[@lee38xzy]

Awesome! Great explanation in a super short video !!

[@aditiaggarwal5493]

After spending 1.5 hours on the web, this is by far the most useful explanation of DI and IOC. Thanks a lot! Can you also cover the Java EE vs Spring vs Springboot?

[@jongxina3595]

Awesome. Finally a tutorial that makes sense. Thank you!

[@AB-os3jy]

best example and explanation I've heard so far. a great vid or series would be to set up a basic program using IoC and Java Spring

[@janezperme9770]

Short and to the point. 😎 Thanks !

[@aposotlossourgakis8618]

Perfect explanation! Thank you very much for this!

[@nerminsehic4542]

Mind blowing explanation! Thank you so much :)

[@chrisolivier6415]

I have to agree with most up top, really well explained, thanks and well done!

[@saurabh5392]

Thank you very much! you made it extremely easy to understand.

[@danmaia575]

Awesome video, very well explained. Its always been tricky to understand it but now I do. Thank you!

[@abolfazlamjadi3571]

short ,fast and useful . thanks

[@古金禾]

Really good explanation! Base on the problems that we met in actually programming, and then show how IoC solve these problems. Very easy to understand ioc from your tutorial

[@gasparottogui]

Great video man! These are confusing concepts, which you were able to put in a simple way! Thanks for sharing!

[@sneakykk]

Thank you so much, although I am working on a nest.js based application, this explanation was generic and I understood it very well.

[@mitchross2852]

Great content. Definitely subscribing. As a experienced dev I just need a quick example to follow to get the idea. A lot easier than trying to read the docs and get the point.

[@l_a_h797]

At 3:13, what does "container.new User()" mean? I'm familiar with "new User()", but what does it mean to do this in the context of the container object? Apparently it's not the same as saying "new Container.User()". I've tried searching for info about this usage of 'new' but couldn't find anything. Is there a term for it?

[@j.q.6208]

Awesomely Explained, Thank you!

[@procrastinator24]

nice and clean explanation! Thank you so much!

[@justincheong6159]

Fantastic! Now I really got a clear picture of why this principal/design is needed!

[@MohiuddinEbnaKawsar]

very nice clean and simple. good job