Transfer the output of papaparse into an array

I'm currently utilizing papaparse to parse a local csv file. Here is the code I am using:

    var display_links = [];
Papa.parse(file_links, {
    header: true,
    download: true,
    dynamicTyping: true,
    complete: function (results) {
        results.data.push(display_links)
    }
});
console.log(display_links)

Is there a way for me to store the parsed data in a local array so that I can access it in other functions or processes?

console.log(display_links)

Currently, this returns an empty array.

javascriptpapaparse

Answer №1

If you find yourself in a situation where results.data.push(display_links) needs to be replaced within your entire function, consider using the reassignment method: display_links = results.data;. It appears that there may have been a misunderstanding regarding the order of operations.

Assuming display_links is declared outside of the function scope, you should be able to access the results later on. Therefore, simply moving it out of the local scope would solve the issue easily.

If this is not possible for some reason, could you provide a more comprehensive example?

let display_links = [];

function doSomethingWithDisplayLinks(results) {
  display_links = results;
}

console.log('display_links before:', display_links);
doSomethingWithDisplayLinks(['http://www.google.com']);
console.log('display_links after:', display_links);

Answer №2

Currently experiencing a similar issue with Papaparse, which may be attributed to my level of familiarity with the library and its callbacks. However, I can provide some guidance on where you might find a solution.

The reason why your display_links is returning an empty array is due to the asynchronous nature of the complete callback function in Papaparse. The assignment of display_links occurs after the file has been completely processed, making it unavailable for logging at that point. In essence, this approach will not yield the desired result.

To resolve this problem, I suggest encapsulating your intended actions for display_links within a separate function. Then, from within the complete callback, call this function with display_links as an argument. This way, your function will execute with the parsed results.

If this solution does not meet your needs, I recommend further exploration into Asynchronous JavaScript and how callbacks operate to discover a more suitable approach for your situation.

A personal challenge I encountered was attempting to abstract the parsing process within a function and have it return the final result once the file had been read/parsed. Unfortunately, calling another function from the complete callback seemed to be the only viable option, as direct return statements did not work as expected.

References:

  • Papaparse Docs - Look for information on complete.
  • Asynchronous JavaScript - Mozilla Link

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