The Power of JS Generators by Anjana Vakil
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- เผยแพร่เมื่อ 3 ต.ค. 2024
- Generators have been around in JavaScript since ES2015, yet remain largely ignored by many JS devs, who don’t see why or how they’d use them in their day-to-day work. But generators - which we can think of as special functions whose execution can be “paused” and resumed later on - are actually extremely powerful tools for producing and consuming series of data. That makes them perfect for implementing lazy sequences, custom iterables, animation, even the convenient asynchronous programming we now enjoy with “await”! In this talk we’ll dive into how JS generators work, what makes them so powerful, and why you should care.
jsconfbp.com/s...
About Anjana:
Anjana suffers from a chronic case of curiosity, which led her from philosophy to English teaching to computational linguistics to software development. These days she mostly codes & teaches from her home base in San Francisco, but she’ll always be a traveler at heart. Nerd out with her about functional programming & JavaScript, ask her about the Recurse Center & Outreachy, and definitely invite her to your karaoke party!
I knew I recognised her from the Functional Programming talk I saw years ago! It's one of the first talks I ever saw and it drove me to learn more JS! Go Anjana!
same thing here bro she is amazing 🔥🔥
Same here
Yay! One more Anjana talk on the internet.
THAT TALK WAS SO GOOD RIGHT?!
She has given several awesome talks, and you can find multiple of them here in youtube! Search for her name, the subjects she covers are varied.
she is back
Folks been waiting for her like a star wars trilogy
Exactly my thought every time i see her in a video
@@bradyfractal6653 She is just excited and happy to be presenting.
I love her energy. Great presentation too! I've always struggled understanding generators.
Bro got that Einstein e=mc2 rizz 👀
I've never seen any speaker in a tech conference that talk so enthusiastic like her
Finally we have a great explanation to generators. I knew about these for quite some time but since they are not much used, had limited knowledge on how to make them work with complex things, especially async ones. Great session.
I can't believe that this video helped me understand generators better than anything I ever saw or read on generators.
just fascinated how can something that's so under talked and underrated small little thing can be this powerful and cool.
Her energy is unmatched
Very good intro. And yes you're totally right, generators are underused. Very much appreciate your talk!
Such a nice talk, it's a shame that the person that editted it made a lot of cuts when code was presented and instead showed audience from the back...
idk what are u talking about
@@N32-e1g approx. 20:15 - 22:30 she explains her code step by step, but we don't see it because it's zoomed out.
@@4ipon4ik anyway u can't learn js by watching conferences
@@N32-e1g idk what are u talking about
Anjana is very energetic which makes the presentation interesting!
start at 9:18
As always, her presentation is amazing!. One small observation: Actually the cardDeck, can be expressed in a purely functional way, as the generators returned by generator function are iterable as well as iterator:
const cardDeck = function* () {
const suits = ["♣", "♦", "♥", "♠"];
const court = ["J", "Q", "K", "A"];
for (let suit of suits) {
for (let i = 2; i
She becomes more energetic every time she takes a sip of this "water".
This could be among my favorite conference talks
I've read about the iterators and iterables from MDN and since then I was like, now I know what can be iterated on JS and how. And when I read about generators I was like, yeah they are there, but how to effectively use them. Thank you Anjana for showing us the various ways.
Brilliant talk. Please keep the code being talked about on the screen!
Yup! Here's the code/slides observablehq.com/@anjana/the-power-of-js-generators
I studied generators few years ago but this explanation is so fun man
Anjana's talks are always bangers.
she is crazy)) and Is it contagious) It spreads) I even see how I shout "Generators!" in the middle of night while I am sleeping
Wow she's exceptional.Great job on this presentation!
Watched from the beginning to the end. Good stuff!
Another excellent talk. I'd recommend a talk she has about functional programming. She is a super good communicator!
Love her energy, what a beautiful soul. Thanks for this wonderful presentation!
This is a great talk! However I always think back to the JS platform docs at my second job (at a very large company).... " Generators: Don't use generators."
And it still makes sense because no matter what you do you'll always end up with code that's "too clever".
thanks!
😂🤣😅
"too clever" a.k.a. requires prerequisite knowledge of how they work, which most devs lack because they're too scared to use them
Bruh how is this too clever? It literally is explained in a 30 minute talk
+1
Excellent presentation of GENERATORS! (who saw the introduction will understand)
Great energy of Anjana Vakil! Thanks!
We want more conf with her !
I have no idea what she’s talking about but it looks cool
Thank you for speaking in this video. I have never heard of generators but now I am curious. Thank you.
i love her energy😃
It was so exciting it ended in a blink of an eye. Thanks Anjana, generators have big potential. I’m gonna experiment with them, doing state manager and renderer.
Finally the legendary is showing up
No doubt its very useful but
Why would you switch camera while she is explaining the code 20:15. :(
yeah, producer was sleeping or editor mistake, or what?
Big fan of Anjana. Good to see her again.
Taking from infinite sequences absolutely blew my mind! Thanks for sharing 😊
At 2:38 she says "duck-duck-go'ing them..." #BOSS
You've been using them without even knowing it. Async/Await are basically syntactic sugar for generators. Before them, to achieve a similar functionality, you had to use generators.
awesome Anjana Vakil, thanks for this masterclass
Definitely she is amazing 😊
love her power
Great to see Anjana again, wow.
Thanks Anjali for showering us with your...
Wow, this is such a great video. Thanks so much!
She is amazing, fun, smart, and beautiful
Her energy and enthusiasm is mind-blowing.
You're like an Marvel Superhero, but to JS. Trully saved me a day (again).
Knew Anjana from her talk on Functional Programming. On her way to be the public voice of JavaScript.
I really appreciate your performance. Now I know more about generators and wanna apply them.😎
She is back again
Great talk! Love how generators can be used for various usecases. Also lowkey, I'm getting Zendaya vibes.
What is Zendaya? Now I'm curious
Anjana knows the best way to engage all your senses
One of the best speakers.
Wow this is very cool!
Amazing stuff! One of the best talks ever! 🙌
Cool... I've seen some really stupid negative comments on some of her other talks but the Anjana fan club is out in force on this one... as it should be.
She made generators quite simple to understand !
Great presentation! Thanks!
Good code is clear, not tricky.
Implementing a bidirectional channel using a proper object would be so much more readable (and customizable) than using generators’ .next tricks
Awesome I finally understand ;)
Generators are so underutilized. I created a javascript framework with them that let's me build web apps in 1/10th of the time it took me before.
Is it open source?
@@Ty-13 Not currently, and there are a lot of reasons for that. One there are a lot of better frameworks out there more suited for speed that people should consider like solidjs. My framework is different.
It doesn't have custom components, just pre-built components that all fit together in a grid system. The cool thing is getting data from the user happens synchronously. So you don't need to have call back functions for forms. When it's on the screen the program yields and waits for the form to be submitted before continuing execution
Still need to be explain, what is the easiest way of implementing data science and Machine learning with js, and to more often a offline ide for such purpose.
I looked for this for ages
I thought I understood generators. This blew my mind.
I have a theory, that she herself is an asynchronous iterable generator, that consumes a lot of data, and some water, and then yields it for all of us, mere mortal, to try and get.
Really cool technology, great to finally have it in JS. We already have that in C# for years, its nothing new.
I wonder when will source generators come for JS.
HOT NEW FEATURE FROM 6 YEARS AGO 🤣 BTW loved it.
Great presentation and great energy! Regarding generators - it might be just me but it still feels to me like generators are a cool yet much less readable way to do stuff. Yield makes code run in a non-linear and less intuitive fashion. I wonder if it is just me...
I didn't realize generators were so powerful
not sure if python stole from js or the other way around, but they seem to look and function identically. very fun to use, but easy to create unreasonable code imo.
Happy to see you again 💜💜
Good to see you.
great talk btw you guys could have at least linked up the resources from the end of the video to your descriptiopn
The problem with those who lack computer education is exactly this.
The order is actually like this:
Stackless coroutines, event loops, self-suspending functions, iterators, simpler syntax generators, coroutines with simpler syntax, async functions, tasks, promises or futures.
But wait, my dear friends.
Promises in JavaScript have nothing to do with promises in reality. They are actually a function that puts itself in a queue!
JavaScript's foolish features insult the spirit of programming and computer science.
legend is back
She is fire 🔥
So one of the most important things generator does is that you cannot store an infinite amount of data on your memory like calculating factorials, or stream of data through api it look something like pagination only bring that part of data, when it actually needed.
wovvv ,,,,,, really amazing....!
Anyone make the Starwars example work? I cant. How it is working? How i can console.log the object starwars with all the data?
Thanks
Quality content, but I needed to slow down the video speed a little :D
nice explanation
AWESOME
What is the tool/website called where Anjana makes her code blocks with?
21:30 I want to see the code...
I don't feel like this talk was particularly useful, as most of the examples could be done easily without generators. Especially the ping-pong was plain stupid as it weren't the generators that enabled to circumvent maximum call stack size, it was the queue + run function.... I really hoped to learn something good here...
Anyway, to me, the only thing that makes generators worth it, is logic and I/O separation. It is something I needed to be able to write testable code that is heavily dependent on external factors like read/write, running external programs or communicating with them, etc... It is something I could not find any different reasonable solution for. There is nothing else I came to contact with for what I couldn't find simpler solution than generators.
Why isn't js pressed about using generators for iteration like c# is? Isn't enumeration of entire arrays really bad in general?
Would it be possible to get those code snippets from somewhere? Yes, I can copy from the screen but maybe I can save some typing if it is.
observablehq.com/@anjana/the-power-of-js-generators
observablehq.com/@anjana/the-power-of-js-generators
the link was on the screen in the beginning observablehq.com/@anjana/the-power-of-js-generators
The slideshow is linked at the beginning of the talk.
Get a mac
is there a way to download the slides, presented in the video?
Makes you wonder why they can't get Tail Recursion into JavaScript compilers, if they can do this stuff :/
awesome
Whoever was a camera man did a very poor job... Why would you switch the camera from the screen when the speaker is showing snippets of code??? Makes this kind of videos much less useful later...
I'm sorry but it's not AanJna VaeKiyal it's Anjana Vakil
i'm not sure why do we need to use them
What is music intro?
Welcome back Anjana
How does event loop handles it?
og is back ❤️
Looks similar to php's generator, but basically this is mostly borrowed concept of disappearing pointers.
this is straight up sorcery
Like your energy
generators are sick