Async Iterators for Big Data Sets

  Рет қаралды 4,098

Steve Griffith - Prof3ssorSt3v3

Steve Griffith - Prof3ssorSt3v3

Күн бұрын

Iterators are great for looping through data sets. If you have an array then it has a built-in iterator. Objects can have a custom iterator built for them.
What if your dataset is too big to fit inside your Array? What if it takes up too much memory? With an Asynchronous Iterator you can load the data in chunks.
The for...of loop will have an await capability soon. However, we can already mimic the behaviour by creating an asynchronous function and calling it recursively.
Code GIST: gist.github.co...
IIFE video: • JavaScript IIFE (Immed...

Пікірлер: 12
@rotrose7531
@rotrose7531 4 жыл бұрын
Learning with you lets me feel very contented. great pleasure. Thank you.
@juniordallagnolo3983
@juniordallagnolo3983 6 жыл бұрын
This guy deserves a medal oO
@shawnliu8810
@shawnliu8810 6 жыл бұрын
This is really cool. Next level javascript stuff
@SteveGriffith-Prof3ssorSt3v3
@SteveGriffith-Prof3ssorSt3v3 6 жыл бұрын
If you want more new JS stuff check out this - kzbin.info/www/bejne/eYDdc6mVeMqmack
@chesterxp508
@chesterxp508 3 жыл бұрын
Another very cool tutorial!
@marcelvansanten8247
@marcelvansanten8247 Жыл бұрын
Why is the output.textContent displayed as [object Object] when the Json data is stringified in the iterator?
@SteveGriffith-Prof3ssorSt3v3
@SteveGriffith-Prof3ssorSt3v3 Жыл бұрын
If you are using the console.log statements as I have them in my code for the contents of data.value then it shouldn't show [object Object]. If you have written a different console.log statement then it could be an object that is being selected.
@hamidRaven13
@hamidRaven13 Жыл бұрын
quite confusing that "symbol and iterator and next" terms in this video and previous one was quite incomprehendable
@SteveGriffith-Prof3ssorSt3v3
@SteveGriffith-Prof3ssorSt3v3 Жыл бұрын
custom iterators are not a beginner topic.
@mehdikamani8004
@mehdikamani8004 3 жыл бұрын
Gets betters without the setTimeout
@nigelbrie5693
@nigelbrie5693 4 жыл бұрын
Is this considered "backend" programming?
@SteveGriffith-Prof3ssorSt3v3
@SteveGriffith-Prof3ssorSt3v3 4 жыл бұрын
The API, the database, the code that sends the data from the database is the backend programming. What I'm doing in this video to fetch the data is still client side / front end programming.
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