Questions tagged [fast-csv]

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Node.js fast-csv synchronously read file and return array

I am trying to read a .csv file and to assign it to an array with this code: const fs = require("fs"); const csv = require("@fast-csv/parse"); let data = [] csv .parseFile(&...
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  • 1,056
4votes
1answer
3kviews

TypeError: csv.fromPath is not a function

I'm using fast-csv to read my csv file but it gives me error like this UnhandledPromiseRejectionWarning: TypeError: csv.fromPath is not a function Here is my code: const fileRows = []; console....
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3votes
1answer
375views

Node Express Fast CSV download to client

I've set up a small node js BE app, built with express and fastCsv module on top of it. The desired outcome would be to be able to download a csv file to the client side, without storing it anywhere ...
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  • 1,978
2votes
1answer
357views

Trying to return 2D-array with fast-csv in Nodejs but returning none

I am attempting to parse a csv-file using fast-csv library and convert each values number or string to create 2d array. But I can't return array in ReadStream. Can you give me advice on my code? const ...
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  • 177
2votes
0answers
279views

How do I handle errors properly with fast CSV?

In the code below, I want to check if the headers are valid and then stop reading the stream if they are and send an error back to the client (via my ErrorHandler function). I see the following in my ...
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1vote
1answer
501views

Cannot push arrays to array - fast-csv, nodejs

I'm using fast-csv npm package to parse incoming csv file and catching event data and displaying row is absolutely OK. I got what I want here. What I've done: fs.createReadStream(req.file.path) ....
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1vote
1answer
64views

With fast-csv how on data-invalid, how do I access the error object?

Using the fast-csv also supports async validation, with a callback example at fast-csv examples How do I get access to the error in the 'data-error' event? The validate event has a callback with ...
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  • 3,659
1vote
1answer
62views

SequelizeUniqueConstraintError create method add only one row

I am trying to parse a csv file with fast-csv and at the end store all the lines in a database with sequelize Here is my script to parse the data: module.exports = async () => { try { let csvData ...
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  • 15
1vote
1answer
52views

"Failed to pipe. The response has been emitted already" when reading a stream (nodejs)

So my code is supposed to read some lines from a CSV file, convert them to an array of JSON objects, and return that array. To read the file as a stream, I am using got, and then using it in fast-csv. ...
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1vote
0answers
82views

Handling Asynchronous stream: Read and Write multiple csv files after filtering dates in nodejs

So I have a bunch of csv files which have more data then I require, I want to filter the data out by only having keeping the rows with dates after year 2015. The Problem is that it works for a single ...
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1vote
0answers
247views

How to save coordinates in a csv file from an android app?

I am working on a project where I want to collect sensor data with coordinates and save them to a csv file. The app was working perfectly before I started coding for getting the location. I am using ...
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  • 594
1vote
0answers
118views

Progress bar to include in EJS

I am uploading a csv file using fast-csv and then submitting all its rows in fileRows Array. Next I am rendering my webpage: res.on('end', function () { res.render("execute", {fileRows}) }); ...
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1vote
1answer
175views

Node.js: Return promises in a defined order

I have some hundreds of JSON files that I need to process in a defined sequence and write back the content as CSV in the same order as in the JSON files: Write a CSV file with header Collect an array ...
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  • 13
1vote
0answers
100views

Sending response to ipcRenderer from ipcMain after asynchronous operation completes

I'm learning Electron by writing the app that should parse and analyze .csv files. As a frontend part of it I'm using Vue.js. Initial functionality should be next: user selects a file, main process ...
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0votes
2answers
249views

Writing 100,000 lines in a csv in fastest way possible

I m trying to create a zip of 100 csv. I need to write 100,000 lines in a single csv in fastest way possible. I am using openCSV, ZipEntry method to write to csv. Some Code used: ZipEntry ...
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