How to Return Multiple Values from Functions in an Array Using JavaScript

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Fetching Data from Multiple Websites in JavaScript

The Problem

Understanding Your Code

First, let’s break down the key components of your code based on the description provided. You’ve set up an array of functions to fetch data but forgot to return the actual data collected after fetching.

Here’s a simplified structure of your code:

Crawling Setup:
You defined an object for each website containing the URL and the corresponding crawl function.

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Crawling Function:
This asynchronous function handles the actual scraping of the website data. It returns a promise that resolves with the crawled data.

[[See Video to Reveal this Text or Code Snippet]]

Fetch Function:
This function retrieves the HTML content from a URL and executes the specified crawl function.

[[See Video to Reveal this Text or Code Snippet]]

You attempt to invoke multiple fetch functions concurrently, aiming to collect the results in an array.

[[See Video to Reveal this Text or Code Snippet]]

The Solution

1. Modify the Fetch Function

To get the results correctly, you need to modify the Fetch function to return the outcome from the crawled callback. Here’s how to update your function:

[[See Video to Reveal this Text or Code Snippet]]

2. Update Crawling Logic

You need to ensure that your crawl functions return a promise that resolves to the data you want. Since you've already set this up correctly, you just need to ensure that all references to the crawl functions are consistent. Here’s your current crawling function for clarity:

[[See Video to Reveal this Text or Code Snippet]]

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Conclusion

By following the above adjustments, you should now be able to scrape data from multiple websites and receive the collected results in a single array. Always ensure your asynchronous functions are set up to return promises correctly for optimal results. Happy coding and happy crawling!