Скачать или смотреть How to Sort an Array of Objects Based on Numbers and Specific Letters in JavaScript

Learn how to sort an array of objects by both numeric and specific string values in JavaScript efficiently.
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This video is based on the question https://stackoverflow.com/q/71511753/ asked by the user 'Hristijan' ( https://stackoverflow.com/u/18493217/ ) and on the answer https://stackoverflow.com/a/71511840/ provided by the user 'depperm' ( https://stackoverflow.com/u/3462319/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

Sorting arrays of objects can be a tricky task, especially when you want to consider multiple criteria. In this guide, we will tackle a specific problem: how to sort an array of objects based on numeric values and specific characters in JavaScript. Whether you're a beginner or a seasoned developer, understanding this concept can greatly enhance your data manipulation skills.

The Problem

Consider an array of objects that looks like this:

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All the objects in this array have an identical time value of 3, and we need to sort these objects not just by time, but subsequently by the mapEventValue property in a specific order: G, Y, R, S.

Understanding the Sorting Requirements

When sorting, we first look at the time value. If time values are equal (which they are in this case), we then sort the objects based on the order of mapEventValue.

Desired Order for Sorting

G

Y

R

S

The Solution

To achieve this sorting, we will leverage JavaScript's Array.sort() method. Here’s the breakdown of how we can implement this solution step-by-step.

Step 1: Define the Sort Order

We will create a string that represents the desired order of mapEventValue. This will help us reference the index positions while sorting.

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Step 2: Implement the Sorting Function

Now, implement the sorting function within the sort() method. Here's how it works:

Check the time Values: If the time values of two objects differ, sort based on the numeric difference of time.

Sort by mapEventValue: If the time values are the same, sort according to the index of mapEventValue in our sortOrder string.

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

Step 3: View the Sorted Output

Finally, log the sorted array to see the result.

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Complete Code Example

Putting it all together, we end up with the following code:

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

Conclusion

By following these steps, you have successfully sorted an array of objects by both numeric and specific character values. Understanding how to manipulate and sort data is crucial for any developer, and mastering these skills can significantly improve your coding efficiency.

Feel free to experiment with your own datasets to see how sorting can be adapted to various needs!