Скачать или смотреть How to Re-order an Array of Objects in JavaScript by Value

Learn how to effectively `re-order an array of objects` in JavaScript based on the specified criteria with an easy-to-follow example.
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Re-ordering an Array of Objects in JavaScript by Value

In JavaScript, working with arrays is a common requirement, especially when handling objects that contain relationships. One interesting scenario arises when you need to re-order an array of objects based on specific values within those objects. In this guide, we will tackle a practical problem: re-ordering an array of character objects based on their follow property. Let’s break down the task step by step!

The Problem

Given an array of character objects, we aim to reorder these objects based on the follow value. If the follow value is not -1, we need to place that object below the object whose id matches the follow value. For example, consider the following array of characters:

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

Expected Output

The desired output after reordering should look like this:

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Note how characters are grouped based on their follower relationships, creating a clear hierarchy.

The Solution

To accomplish this reordering, we will implement a function called sortChars. This function uses a systematic approach to traverse the array, placing characters in the appropriate order based on their follow references. Here’s how it works:

Step 1: Initialize Variables

First, we need to create a result array where the sorted characters will be stored. Then, we will filter out the leaders (characters whose follow value is -1) from the original array:

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

Step 2: Iterate Through Leaders

Next, we will loop through each leader character. For each leader, we will continue to find and add their followers one by one until we reach the end of the chain (where the follow value is -1):

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

Step 3: Return the Result

Finally, we'll return the result array containing the reordered characters:

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

Full Function Implementation

Putting the pieces together, we get the complete function implementation as follows:

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

Conclusion

Reordering an array of objects based on nested relationships can be accomplished with a straightforward strategy using filtering and iteration. In our example, we effectively arranged characters based on the follow value using a simple loop construct. Feel free to modify this approach for larger datasets or different structures as you explore more complex JavaScript scenarios!

By following this guide, you can effectively handle similar tasks involving arrays of objects, enhancing your JavaScript skills overall.