7:00 lambda 7:26 backward compatibility of Java 8:18 9:34 why Java 8 is backed by single abstract method interfaces (@FunctionalInterface) 9:47 if an interface is single abstract method interface, you can use lambdas instead of anonymous inner classes 11:47 how does it work under the hood 12:49 illusion aobut lambda - syntax sugar, i.e. on the instruciton level, it is the same as anonymous inner class 14:16 what lambda does under the hood 14:47 what would the compiler be doing with lots of lambda (assumption only) * 18:16 why it is not a good idea for lambdas to create extra classes like anonymous inner classes 19:14 a new feature since Java 7 - instruction - invokedynamic 20:53 in Java 8 struggling with the elimination of anonymous inner classes 21:00 the motivation: use invokedynamic to implement lambda expressions 25:16 example 29:18 internal iterator 39:00 method reference 44:28 avoid the urge of writing a large lambda expression - an anti-pattern 44:54 what are method references 45:41 examples of method references 47:15 static method reference 49:31 parameter as a target map(String::toString) 54:58 2 arguments * 56:23 the order of the arguments are important 57:38 another example - first parameter is the target, second parameter is the argument 59:33 limitations of method reference 1:08:00 filter 1:19:30 second part 1:29:07 stream is an abstraction 1:29:12 a stream is not a physical object with data 1:29:24 a stream is a bunch of functions you will evaluate eventually. There is no data sitting in a stream 1:29:48 a stream is a non mutating pipeline - stream is not mutating the data in a collection 1:30:31 stream functions 1:33:11 transforming function - Stream.map 1:37:25 Stream.reduce() 1:43:47 InStream/DoubleStream.sum() - also a reduction operation 1:44:08 what is reduce operation - transform a collection into a concrete value or object 1:44:51 another reduce operation - collection 1:45:45 a wrong approach to do collect 1:47:00 explanation of the wrong code 1:47:18 shared mutability is devil 1:49:04 use Collectors.collect 1:51:17 Collectors.toMap 1:54:17 groupingBy 1:54:38 example 1:57:40 another example with mapping() method 1:59:37 performance 2:05:40 Q: How much work? 2:09:30 streams are LAZY 2:10:49 intermediate operations are postponed for evaluation 2:13:00 important * 2:15:43 * 2:16:15 2:17:37 demo for performance analysis 2:19:36 lazy evaluations are only performed when the terminal operation is triggered 2:27:08 intermediate operation - Stream.sorted()
Venkat was my professor at UH for my last year in computer science. He is by far the BEST computer sceince professor I have ever had. I learned more from him in one semester than I did from when I started coding in highschool.
finally, someone intelligent and articulate enough with great dynamic working examples explains lambda and double colon. thank you. after much searching its finally clear to me. ☺
I just can't express how glad I am to land here. He has explained java 8 features with so much depth and conviction. Venkat sir just knows the features inside out and he is in love with Java. ❤
superioriginality = qualities.reduce(blessing, (feature, excellency) -> feature.add(excellency)); Dr. Subramaniam rocks as ever. Thank you for another great session !
34:49 "And for the first time, in a long time, Java is finally intelligent" that was the moment I lost it. This guy has such a talent of explaining stuff!
One of my new favorite speakers ever. It's all gold, but the motivational parts especially, even tho the technical details are all spot on and valuable. Like 1:02 thru 1:05, not strictly technical, but extremely important in terms of WHY we need to modernize our Java style....
Indeed a great talk on lambdas and streams. If you have been coding in java for a year or more , then you could even watch it at 1.75x without losing on any info
I created an IntelliJ plugin which provides similar functionality which outputs the result of a Java main execution as a tooltip. The plugin can be found here: plugins.jetbrains.com/plugin/8543?pr=idea
Like this talk and the way of communicating some of the design philosophies. Not just what can be done.. but also the why and how of it is covered here.
I just love that editor and how intelligent that thing is! Venkat should do just one nice session on that editor setup. That would help the community so much :)
Really an awesome talk,the way you explained with real time examples and jokes is really superb. You made Lambda and Stream learning so easier. Pleasure to saw your teaching and Gonna see all your talks in you tube. One of the best java talk ever ! Thank you so much Venkat
Wow! Great explaination of Lambda and Streams. His explaination and examples are so concise and easy to understand that I've ever seen. Very very thanks !!
"When you have 9 million programmers using your language and out of which 1 million programmers know where you live you have to decide things differently." :D
Nice explanation sir... Very informative.. I would say I have never attend any tech show.. Where someone explained like this during my entire career.. Lol now I got it what was missed in my eduction. 😕😕
"If a language does not support backward compatibility, it is DOOMED; we also know if a language supports backward compatibility it's also DOOMED!... and so it's a question really choosing which way you like to be DOOMED!" LMAO!
Hi venkat, I referred so many author's to understand java8 features, but some how I got ur video in the list. I just looked into it, it was just awesome. Thank you for ur efforts
For people who feel play back rate 1.00 is too fast and 0.75 is slow, try this trick. Right click and select "Inspect" --> Choose "Console" tab --> paste " document.querySelector('video').playbackRate = 0.90; " (without quotes) and hit enter.
While explaining the time taken by for loop in finding the value of even number greater than 3 and multiplying the same by 2, Venkat explained as if the for loop goes through all the values before giving the result. The explanation of men in black T shirt, white shoes etc., strengthen this impression. As someone, mentioned a break statement at the end of the for loop as soon as the required number is found, then the for loop will stop functioning. No doubt writing a stream function is easier and clearer than writing a for loop. For loop does take more time than the stream, no doubt, but the explanation needs modification.
Very clear and useful informations, very grateful for them. A question though: isn't also type inferrence when you only have to write List cars = new ArrayList() instead of List cars = new ArrayList()? - you are saying that Java 8 has type inference only for lambda expressions...
7:00 lambda
7:26 backward compatibility of Java
8:18
9:34 why Java 8 is backed by single abstract method interfaces (@FunctionalInterface)
9:47 if an interface is single abstract method interface, you can use lambdas instead of anonymous inner classes
11:47 how does it work under the hood
12:49 illusion aobut lambda - syntax sugar, i.e. on the instruciton level, it is the same as anonymous inner class
14:16 what lambda does under the hood
14:47 what would the compiler be doing with lots of lambda (assumption only)
* 18:16 why it is not a good idea for lambdas to create extra classes like anonymous inner classes
19:14 a new feature since Java 7 - instruction - invokedynamic
20:53 in Java 8 struggling with the elimination of anonymous inner classes
21:00 the motivation: use invokedynamic to implement lambda expressions
25:16 example
29:18 internal iterator
39:00 method reference
44:28 avoid the urge of writing a large lambda expression - an anti-pattern
44:54 what are method references
45:41 examples of method references
47:15 static method reference
49:31 parameter as a target map(String::toString)
54:58 2 arguments
* 56:23 the order of the arguments are important
57:38 another example - first parameter is the target, second parameter is the argument
59:33 limitations of method reference
1:08:00 filter
1:19:30 second part
1:29:07 stream is an abstraction
1:29:12 a stream is not a physical object with data
1:29:24 a stream is a bunch of functions you will evaluate eventually. There is no data sitting in a stream
1:29:48 a stream is a non mutating pipeline - stream is not mutating the data in a collection
1:30:31 stream functions
1:33:11 transforming function - Stream.map
1:37:25 Stream.reduce()
1:43:47 InStream/DoubleStream.sum() - also a reduction operation
1:44:08 what is reduce operation - transform a collection into a concrete value or object
1:44:51 another reduce operation - collection
1:45:45 a wrong approach to do collect
1:47:00 explanation of the wrong code
1:47:18 shared mutability is devil
1:49:04 use Collectors.collect
1:51:17 Collectors.toMap
1:54:17 groupingBy
1:54:38 example
1:57:40 another example with mapping() method
1:59:37 performance
2:05:40 Q: How much work?
2:09:30 streams are LAZY
2:10:49 intermediate operations are postponed for evaluation
2:13:00 important
* 2:15:43
* 2:16:15
2:17:37 demo for performance analysis
2:19:36 lazy evaluations are only performed when the terminal operation is triggered
2:27:08 intermediate operation - Stream.sorted()
Awesome toc 👍☺
Very informative and well explained, thank you.
You probably made it for yourself, didn't you ;)
@@infitium7246 yes, i have bad memory, so jot it down make me remember better :)
Hats off!
Venkat is not just really knowledgeable but he knows how tell and express concept in the way even a kid could understand . Thanks .
2w
@@veenasharma2440 from india?
@@udaykiran557 from india?
@@satishsatyan3520 Yes
@@udaykiran557 .
One of the best java talks ever seen.
Very informative.
短短的看到哦的哦地盘耳畔网片 W_PP_W_PE_PE_PE_PD
agree
Venkat was my professor at UH for my last year in computer science. He is by far the BEST computer sceince professor I have ever had. I learned more from him in one semester than I did from when I started coding in highschool.
This guy speaks very well. Usually indian guys are hard to understand. This guy is awesome!
finally, someone intelligent and articulate enough with great dynamic working examples explains lambda and double colon. thank you. after much searching its finally clear to me. ☺
youtube rocks
The best java talk I've ever seen
me too...:)
.
Same here
1:02:40-1:05 the heart of programming! Great talk!
Best!
Well he said you came here for Lambda but stayed here for stream but I got addicted to Venkat. Amazing speaker. Thank you.
I have been converted to functional style programming using Lamdas and Streams thanks to Venkat.
Double thumbs up!
This is hands down the best Java conference evere made
The best speaker I've ever heard. I am delighted
I just can't express how glad I am to land here. He has explained java 8 features with so much depth and conviction. Venkat sir just knows the features inside out and he is in love with Java. ❤
superioriginality = qualities.reduce(blessing, (feature, excellency) -> feature.add(excellency)); Dr. Subramaniam rocks as ever. Thank you for another great session !
34:49 "And for the first time, in a long time, Java is finally intelligent" that was the moment I lost it. This guy has such a talent of explaining stuff!
This is how you explain advanced stuff in simple way. Tell me why i should bother to use a new feature. Amazing.
What a great speaker.
One of my new favorite speakers ever. It's all gold, but the motivational parts especially, even tho the technical details are all spot on and valuable. Like 1:02 thru 1:05, not strictly technical, but extremely important in terms of WHY we need to modernize our Java style....
Really amazing. I am a big fan of Venkat. His book "Functional Programming in Java" is also a must read for all Java Developers.
Thanks for comment, I needed some book as a guide.
Love his enthusiasm and his crisp and clear explanation.
Indeed a great talk on lambdas and streams. If you have been coding in java for a year or more , then you could even watch it at 1.75x without losing on any info
One of the best java talks I have ever scene that even a beginner can understand it...
Cant believe i just listen through the whole video...
He is brilliant teacher
he is best at explaining things...became fan of him.
His pace of explanation is perfectly suitable for me
As the title says, I addicted to Stream; But I addicted to your lectures more than it. Thanks Venkat, it was really helpful.
Just watched 24 mins and gave my like to the video. What a speaker, cheers!!! -)
I created an IntelliJ plugin which provides similar functionality which outputs the result of a Java main execution as a tooltip. The plugin can be found here: plugins.jetbrains.com/plugin/8543?pr=idea
Like this talk and the way of communicating some of the design philosophies. Not just what can be done.. but also the why and how of it is covered here.
I'm fortunate to watch this video! Speechless.. Absolutely recommended for people like me who didn't know the potentials of lambdas and streams.
What a great talk, Venkat gave the best explanation about streams I've seen, and I've seen quite a few so far.
your one of the best teacher I have seen till now..
This is one of the best videos that I saw about Streams and Lambdas!!
I sincerely wish I could like this video more than once. Simply brilliant
Claps for your passion for programming especially for your comments at 1:00
just came to learn lambda.... never had a blast before learning programming concepts
I just love that editor and how intelligent that thing is! Venkat should do just one nice session on that editor setup. That would help the community so much :)
Did you find that already?
Indians are awesome! thanks, Venkat sir.
Been 6 years and it's still useful :)
A rare species : someone who can do tech, can talk and also keep you engaged for a full 3 hours.
I had come to see this video to brush my knowlege. I ended up learning many new things. excellent explaination
Really an awesome talk,the way you explained with real time examples and jokes is really superb. You made Lambda and Stream learning so easier. Pleasure to saw your teaching and Gonna see all your talks in you tube. One of the best java talk ever ! Thank you so much Venkat
Buddy, I caught you here. I even like the talk. best ever java talk
He is amazing!! Best Java talk ever
Wow! Great explaination of Lambda and Streams. His explaination and examples are so concise and easy to understand that I've ever seen. Very very thanks !!
"When you have 9 million programmers using your language and out of which 1 million programmers know where you live you have to decide things differently." :D
HEX D
This guy is a great speaker! Thanks for the awesome talk.
Thanks a lot for such a informative talk.. watched entire 2:47 hours
Fantastic presentation! What a great speaker! One of the best presentations that I've watched.
Great talk, very informative for those who are starting to work on java 8. Awesome explanation.
Am binge-watching presentations by Venkat.
Brilliant. Best value for 2 hours spend watching the video
GREAT!!!! so many details! so many examples! awesome! thank you a lot!
Venkat is an awesome teacher! Thanks a lot for sharing!
Wow, not sure why I didn't use of java 8 functional style until now. Great talk
Thank you so much, Venkat!!!
Nice explanation sir... Very informative.. I would say I have never attend any tech show.. Where someone explained like this during my entire career.. Lol now I got it what was missed in my eduction. 😕😕
"If a language does not support backward compatibility, it is DOOMED; we also know if a language supports backward compatibility it's also DOOMED!... and so it's a question really choosing which way you like to be DOOMED!"
LMAO!
There's a lot of crap in his talk apart from the actual content, which wastes my time. I am better off reading a book than watching his talk.
Just upgrade and move on.
make your nuts tight!
Venkat is brilliant. Indian minds are like gods.
its about perceiving and realizing. Not blind mugging.
This man is really good at talking and explaining
Great explanation with great examples... Thank u for giving me the imp of lambda & stream.
Finest explanation on streams. Thank you very much!
Hi venkat, I referred so many author's to understand java8 features, but some how I got ur video in the list. I just looked into it, it was just awesome. Thank you for ur efforts
Thank you. It is such informative video and I really love the way you present it.
1:06:00 One of the best explainations
Awesome. Excellent presentation. I wish I have seen this earlier. Recommend.
For people who feel play back rate 1.00 is too fast and 0.75 is slow, try this trick.
Right click and select "Inspect" --> Choose "Console" tab --> paste " document.querySelector('video').playbackRate = 0.90; " (without quotes) and hit enter.
Really like the part with the performance analysis, most video about FP stop on the declarative part and don't go further.
Thanks Sir, you got my like
Its really a very good talk!!! The way concepts presented helps understanding it from the core.. Great job sir.
Best Talk Heard Yet!
Awesome sessions. Java made easy and interesting. Excellent speech.
Venkat is really becoming my code hero
Really finding it very interesting and glued.
Venkat , you are simply amazing.. Great talk!
And with no shoes ... love u bro !!!
one of my favorite features was "replace lambda with method reference", until i started watching this videos
Amazing lecture on functional programming. The best I ever heard!
think new session required to introduce ide 😁, very impressed. thanks a lot
What entertaining educational talk, thoroughly enjoyed!
This video is gold.!
Great Job!!!!
Very Consuming.Awesome video
Wonderful speaker.. amazing analogies
Very dynamic person!!
Content and the way it is explained is nice. Thank you.
While explaining the time taken by for loop in finding the value of even number greater than 3 and multiplying the same by 2, Venkat explained as if the for loop goes through all the values before giving the result. The explanation of men in black T shirt, white shoes etc., strengthen this impression. As someone, mentioned a break statement at the end of the for loop as soon as the required number is found, then the for loop will stop functioning. No doubt writing a stream function is easier and clearer than writing a for loop. For loop does take more time than the stream, no doubt, but the explanation needs modification.
how to speak about a boring thing in a very brilliant way ... and in white socks ... amazing !
Fantastic explaination..... 5 Starts
One of the best java talks!!
Awesome presentation. Truly gifted at explaining concepts
Amazing explanation. I ever scene this kind explanation
Great job Mr. Subramaniam !
He's so awesome, thanks for the talk!
The Best java talks i have ever seen...
gc() those unlikers...
GREAT!!! Awesome presentation. Thanks a lot...
Thanks a lot this man is competent,
Small mistake on 1:43:00 the first param of reduce is actually R not T. the same as return type.
Very clear and useful informations, very grateful for them. A question though: isn't also type inferrence when you only have to write List cars = new ArrayList() instead of List cars = new ArrayList()? - you are saying that Java 8 has type inference only for lambda expressions...
Awesome Explanation Sir. Thank you so much
Really, really, awesome!
This presentation was magnificent !
You are a Rockstar, period.
"A person who uses all the tools are called consultants" (1:05) - hahaha, you made my day sir!
You are one of the very best.