Identifying Duplicates in Nested Properties with JavaScript Objects

Discover how to effectively find and mark duplicate names in nested properties of JavaScript objects featuring adults and children in a Vue 3 array.
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Identifying Duplicates in Nested Properties with JavaScript Objects

The Problem

Imagine you have an array of room objects, each containing an array of adults and children. Each of these entities has names composed of first and last attributes. Your goal is to identify and mark duplicates among the names—if the same first and last name combination appears in the same room, you want to add an error property to the respective entries to indicate this issue.

Example Structure

Here’s how the data structure looks:

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

The Solution

To solve this problem, we’ll create a function that iterates through the rooms and checks for duplicates within both adults and children. Here’s a breakdown of how to implement this in JavaScript.

Step-by-Step Approach

Initialize a Store: We will use a temporary store object to keep track of the names we’ve encountered so far.

Create a Key for Identification: By combining the first and last names into a single key, we can easily identify duplicates.

Mark Duplicates: Whenever we encounter a name that already exists in the store, we will mark it as a duplicate.

Here’s how the code looks:

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

Explanation of Key Function (findDupe)

Combining Names: The key is made by concatenating first and last names together, allowing us to uniquely identify each person based on their name.

Dynamic Storage: The store tracks duplicates in a type-specific manner (either adults or children).

Marking Duplicates: If a name already exists in our store, we mark the first instance alongside the new instance to highlight the duplication clearly.

Conclusion

In this guide, we’ve walked through a systematic method of finding duplicates in nested properties of JavaScript objects. By utilizing arrays and a simple object for dynamic tracking, you can efficiently mark duplicates across complex data structures. This technique not only keeps your data clean but also enhances user experience by prompting for necessary updates when duplicate names are detected.

Now you can implement this logic in your Vue 3 applications and ensure that duplicate entries are managed effectively! Happy coding!