Dart Streams - Flutter in Focus

This is the third video in the Flutter in Focus series on asynchronous coding in Dart. In this episode, learn about the fundamentals of reactive coding with streams. Like futures, streams deliver data asynchronously, but while a future provides a single value and stops, stream keep right on going, and provide multiple values (or errors!) over time.

For more deep dives on things like Stateless and Stateful widgets, Flutter on iOS, and other advanced topics, check out the other episodes of Flutter in Focus.

This video is also subtitled in Chinese, Indonesian, Italian, Japanese, Korean, Portuguese, and Spanish.

#dart #darttopic

[thijsoudeavenhuis]

These videos are really helpful. Please keep making more of this useful content. I am starting to love flutter/dart more and more.

[saguoran]

I tried the stream, but I could use the streamController the add data, why do we need the sink to add data?

[frankemeli]

I just love Andrew so much. His presentation is always clean and straight to the point. Thanks man!

[WilsonSilva]

If it wasn't for these videos, I wouldn't consider Dart. Thank you, Andrew.

[mahmud-ahsan]

Elegant way to describe the stream and related features. Thank you.

[hanifshahy]

Thanks alot! in this video I found how to solve `Bad state: Stream has already been listened to.` error.

[CprkMagicMoves]

Really awesome widgets of flutter. Streams concept is very nice.

[viniciusqueiroz]

This video is incredibly didactic. Clear, concise, and complete. Thank you!

[Mabidakun]

The whole team involved in the creation of these videos should be very proud of themselves. These videos are amazingly easy to follow and understand. 

Well done.

[Build_the_Future]

How would you receive and transmit to a Socket coming from a particular IP and port?

[RaitonGG]

is it possible to "stream" videos from youtube v3 api? or does it only support gets?

[rebarius]

👌🏼 i just used the streambuilder before that video, but the where and map functions are helping me a lot here 👌🏼

[TheChrist]

How do these guys know all this stuff!!!

[user.wioelogj]

Hi Andrew, thank you for videos on this topic! I have a question. Does StreamController consume a lot of resources? Is it okay to have like several hundreds, maybe one thousand of active controllers in a mobile app?

[bikkikumarsha]

Awsome as always. One of the world's best teacher. To the Point.

[alfredoqwe]

?Donde está el código completo y funcionando para poder entenderlo?
?Porqué los tutoriales y manuales de Flutter son tan incompletos y confusos al punto de ser inservibles?
Este tema que debería ser simple, como actualizar las respuestas de las Class y sus datos almacenados es inentendible por culpa de los malos tutoriales e información confusa sin ejemplos que funcionen, .
Ni siquiera encuentro un ejemplo en la web sin error....

Mi sensación es que Flutter es de esas cosas gubernamentales que deberían ser simples, pero la casta de burocratas las hacen inentendibles, salvo para ellos.

Pensar que Google vive de facilitar informaciones, parece un mal chiste....

[FlutterExplained]

Great video :) thanks for sharing. Knows someone where I get that flutter / dart shirt?

[mikem]

These videos make google technologies take over so fast

[hossameldinmahmoud]

Great video, but how can I compare between streams in unit testing?

[dam.s]

Excellent presentation, superb video.