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Learn how to sort JavaScript arrays based on multiple fields, including combinations of numbers and strings. Improve your coding with clear examples and simple explanations.
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This video is based on the question https://stackoverflow.com/q/64315193/ asked by the user 'Hemant P' ( https://stackoverflow.com/u/13553758/ ) and on the answer https://stackoverflow.com/a/64315311/ provided by the user 'Nina Scholz' ( https://stackoverflow.com/u/1447675/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Sort JavaScript Arrays by Multiple Fields: A Step-by-Step Guide

Sorting arrays in JavaScript is a common task for developers, especially when dealing with complex datasets. If you're working with an array containing various fields, including a combination of numbers and strings, you may encounter challenges while trying to sort it effectively.

The Problem

In this guide, we'll address a specific problem presented by a developer struggling to sort an array of employee records based on grades and first names. The current dataset looks like this:

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While the initial sorting logic accurately sorts the grades, it does not take into account the sorting of names. The developer wants to achieve a final sorted array that prioritizes grades and then breaks ties using the first names.

The Solution

To sort the array based on multiple criteria (in this case, grade first and then first name), you can utilize an object to define the sort order for grades and modify the sorting function accordingly.

Step-by-Step Breakdown

Define Your Order: Create an order object that specifies how grades should be prioritized. For instance, you’ll want 'K' to come first, followed by the numeric grades and finally 'Others'.

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Modify the Sort Function: Update the sort function to first check the grade based on the predefined order. If two items have the same grade, next, the function should compare the first_name using the localeCompare method.

Here’s how the updated sort function looks:

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Print the Result: After sorting, you can log the sorted array to see the output.

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Complete Code Example

Here's the complete code example with the above modifications:

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Conclusion

By following this guide, you can efficiently sort JavaScript arrays based on multiple fields, including those with mixed types of data. This not only makes your code cleaner but also enhances the usability of data for end-users. For more tips and best practices in JavaScript, stay tuned for our next posts!