This was very helpful. Thank you

Thank You! This helped a lot with writing 20mil records to solr.

@WebDevCody

Жыл бұрын

Oh wow this actually helped? I’m glad 😂

Awesome explaination

nice! This is good to know. Thanks!

Super stuff, thanks. Subbed

Great video, thanks

Cool video, thanks subscribed

Good job babe!!!

thank u, buddy!

Hello @vJunkie, Thanks for the great content. CAn you make a video using csv-parser & fs libraries to read & write csv files ?

there is a core module called readline that works with streams to read one line at a time, no need to write the logic yourself, otherwise great explanation and video. Cheers

@veremox

Жыл бұрын

im not an expert but a chunk is not necessarily a line...

@oscarmamani5996

Жыл бұрын

martinmingosuarez8690 thank you for this comment! it help me

@LegendKopper

8 ай бұрын

-----The topic "NodeJS streams----> (your head)

This might be helpful to me i am trying to read csv data and insert it into mongodb first before parsing it

Hello Sir, I have a question, much appreciated If you can address my doubt. Do chunks come in sequence, in other words, does the read stream wait for the current chunk to finish the operations before it emit the "data" event to process the next chunk? You have a potentially long running iteration there and more importantly, each chunk is interdependent to each other as the last If statement is used to assign the last incomplete row to "unprocessed" variable for the next chunk to use.

@WebDevCody

2 жыл бұрын

Yes they should come in order.

@empty8537empty

2 жыл бұрын

It should be in order..which is taken care by your transport layer..

What if I want to read data of users - User{age:20………height:7“} - and save it into a database, but that chunk of data miss some properties that a user have like height:7“ ? Could this happen if yes how to solve it

How do you pass a chunk size ?

them jump cuts

@boople2snoot

2 жыл бұрын

also no sub, your variable is overWatermark, you're waiting for an event emitter if not overWatermark, the function therefore must return true if it is not over the watermark and var should be named underWatermark. Or it would run if not overWatermark, which is under the watermark, which? shit you just ramble, bye.

if you show us the format of the csv file it would have made much more sense.

@majidshah48

2 жыл бұрын

i think opening the file will take time or it might just crash

node version?

Hi, I really enjoy your videos. One of the most productive publisher on KZread. But in that video the name "overWatermark" is highly misleading. I struggled understand the whole structure only because of that naming. This would be better if you use instead "canWrite". canWrite is true when we can write and false when the buffer is full. Then we stop -> !canWrite. const canWrite = writeStream.write(`${i}, `); if (!canWrite) { await new Promise((resolve) => writeStream.once('drain', resolve)); } } I might be wrong of course. Other than that - great job again. Continue watching you content 🙂