node-csv | Efficient Evented CSV Parsing in node.js | CSV Processing library
kandi X-RAY | node-csv Summary
kandi X-RAY | node-csv Summary
A CSV parser for node.js that will parse provided text data or stream parse a file. This allows you to process large files efficiently and using the raw power of node.js’s event system.
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QUESTION
I am trying to convert a csv file to a json file using npm node-csv and csvtojson. I installed both in visual studio code, and wrote the following code as per the example in the csvtojson github page:
...ANSWER
Answered 2021-Apr-25 at 09:13Some days ago face the same issue. Here is how I solved it with csv2json, don't forget to import it
.createReadStream(${__dirname}/data/mydata.csv) - Here i put directory of data.csv
QUESTION
From React dropzone, i receive a File object with a File.preview property whose value is a blob:url. i.e. File {preview: "blob:http://localhost:8080/52b6bad4-58f4-4ths-a2f5-4ee258ba864a"
Is there a way to convert this to json on the client? The file isnt need to be stored in a database (the convert JSON will be). I've attempted to use csvtojson but it's unable to use the file system as it uses node to power it. Ideally would like to convert this in the client if possible, once user has uploaded it. Any suggestions welcomed.
...ANSWER
Answered 2017-May-03 at 16:49Yes, its possible with FileReader and csv:
QUESTION
When using node-csvtojson how can I output data as a json array?
...ANSWER
Answered 2019-Jan-29 at 20:38At the time of asking I am unable to do what I want with the csvtojson api.
In case anybody is interested my eventual solution was to use through2-map and through2-reduce to create an array.
QUESTION
[Disclaimer: This is my very first shot at Node (I am mostly a Clojure guy)]
I am parsing and transforming a CSV file with node-csv. The transform happens with IO over the wire and I wrapped the callback with a async/await construct.
...ANSWER
Answered 2019-Jun-24 at 17:20The issue is your transform function
QUESTION
I'm parsing a csv fils to json with node-csvtojson and I got a JSONarray with the following code
ANSWER
Answered 2019-Feb-21 at 06:46QUESTION
I want to use CSVtoJSON to process a CSV to an JSON object. But I do have a CSV string and not a file as described in the docs as csvFilePath.
ANSWER
Answered 2018-Dec-07 at 12:21Try this library:
QUESTION
Using SSDT, I can specify whether individual fields are text-qualified or not. This is useful for a CSV that I'm parsing where only one of the fields is text qualified (I can't easily ask for an export where all the fields are text qualified).
Using the CSV parsing library adaltas/node-csv-parse, I see that you can specify a text qualifier (i.e. the quote param) but that this seems to be for either all fields or no fields.
Is it possible to specify that certain fields are text-qualified (i.e. "qualified" and certain fields NOT to be text-qualified (i.e. not qualified)? Then, since this seems a good place to ask it, is it possible to specify different qualifiers for different fields when parsing a CSV?
I don't think that the CSV specification has anything to say on this, but shouldn't either all fields or no fields be text-qualified??
...ANSWER
Answered 2018-Aug-06 at 14:36In csv, quotes are used around fields that contain a separator (or another quote or newline in multiline fields):
QUESTION
I've found several examples on S/O and otherwise, but they don't seem to be helping me.
I'm creating a private module in node that takes in a csv and converts it into a json object. It is properly outputting the correct value onto the command line, but the object itself is undefined.
...ANSWER
Answered 2018-Apr-23 at 21:10Got it. I just used waterfall to put the two individual modeles together:
QUESTION
Reading a CSV file, I can't return the data read. console.log(data) contains what I need, but it's not returning data (e.g. when calling the readCSV function):
ANSWER
Answered 2018-Mar-17 at 18:23I'm guessing it's because parse() is an async function. You would either want another callback to retrieve the value, or use the new trendy approach of using promises:
QUESTION
I'm using csv-to-json, a neat library to process CSV files.
I've got a use case where I need to process a large (>2 million rows) CSV and insert it into a DB.
To do this without running into memory issues, I intend to process the CSV as a stream, pausing the stream every 10000 rows, inserting the rows in my DB and then resuming the stream.
For some reason I can't seem to pause the stream.
Take for example the following code:
...ANSWER
Answered 2017-Jan-21 at 19:52You cannot do it unless you modify the csv2json library.
This is the link you should read first
https://nodejs.org/dist/latest-v6.x/docs/api/stream.html#stream_three_states
The stream is in paused mode when you did rs.pause(). Infact even if you don't do it the readable stream starts in paused mode.
The stream goes into resume under 3 scenarios.
- Either there's an
.on('data')event listener or - there is a
.pipe()method attached or readable.resume()is called explicitly.
In your case the fromStream() method has the pipe method attached to your readable stream which thus resumed the stream.
Reference code:
https://github.com/Keyang/node-csvtojson/blob/master/libs/core/Converter.js#L378
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