How to Remove Symmetric Arrays from an Array in JavaScript

A detailed guide on how to effectively remove symmetric arrays from a given array in JavaScript with a practical code example.
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Introduction

In the world of programming, it's not uncommon to encounter arrays containing pairs of elements that are symmetric. Symmetric arrays are those that can be reversed to form another array, such as ["A", "B"] and ["B", "A"]. This can pose a unique challenge, especially when you want to clean up your data by removing these symmetric pairs from an array.
In this guide, we're going to discuss how to remove such symmetric arrays from an array in JavaScript, ensuring that the resulting array only contains unique pairs.

Understanding the Problem

To illustrate our issue, let’s consider the following example. We have an array that looks like this:

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

From this array, we want to remove pairs that are symmetric. Specifically, we want to remove the first and third arrays, which are symmetric (["", "A"] and ["A", ""]). The resulting array should look like this:

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

Solution Overview

We’ll tackle this problem using a JavaScript function called removeSymmetryArray. This function will iterate through the original array, check for every array if its symmetric counterpart already exists, and build a new array with only non-symmetric arrays.

Step-by-Step Breakdown of the Solution

Initialize an empty result array: This will hold our final arrays after filtering out symmetric pairs.

Loop through the original array: We will analyze each sub-array to determine if its symmetric counterpart exists in our result array.

Check for symmetry: For each array element, we will call a helper function, isSymmetryArrayIncludes, to verify whether the symmetric version of the current array is already present in the result.

Update the result array:

If no symmetric counterpart is found, we add the current array to our result array.

If a symmetric counterpart exists, we remove the symmetric pair from our result array.

Return the cleaned result: Finally, we will return the result array that holds only non-symmetric pairs.

The Code Implementation

Here's the complete JavaScript code implementing the above logic:

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

Explanation of the Code

res: This array will store our final results.

isSymmetryArrayIncludes Function: This function checks if the symmetric version of the current sub-array is present in the result array. If found, it returns true.

Filtering Logic: If a symmetric match is found, the filtering logic will remove the symmetric counterpart from res, ensuring we maintain only unique, non-symmetric pairs.

Conclusion

Removing symmetric arrays from a list can be effectively managed with proper logic and JavaScript functions. This method keeps your data clean and allows you to focus on unique data points without duplicates. With this approach, you can also modify the logic to suit more complex scenarios, should your data requirements evolve. Happy coding!