Merging Array of Objects with the Same Key in JavaScript

Learn how to merge objects in a JavaScript array effectively while handling dynamic nesting structures.
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Merging Array of Objects with the Same Key in JavaScript

In the world of web development, handling structured data such as JSON is common. One challenge that developers often face is merging objects within arrays that share the same keys. This guide will introduce you to an example problem where you need to merge the aggregates property of two objects found in a JavaScript array.

The Problem

Let's say you have the following JSON data structure, which consists of an array containing two objects:

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

Your goal is to merge the aggregates property of the second object into the first one, resulting in an updated object that contains the additional aggregated values.

The Solution

To accomplish this task, follow these two main steps:

Step 1: Extract Required Elements

First, you will have to extract the aggregate values from the second object within your array. Assume that you have stored the data in a variable called data. You can use Object Destructuring to simplify the process:

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

Step 2: Add Extracted Values into the First Object

Now that you have the required data, the next step is to add this value into the aggregates object of the first object in the array:

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

Example Result

By incorporating the extracted values, your first object will now reflect the additions made:

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

Important Note

It's crucial to consider that performing this operation creates a shallow copy of the VALVAL_ALT_CMB_AMT variable into VALVAL_ALT_CMB_AMT_1. It’s generally not a good practice to delete the original object in position 1 from the array. Instead, it may be more prudent to return a new array featuring the updated object:

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

Conclusion

Merging objects in an array that share similar keys is a common requirement in JavaScript development. By leveraging object destructuring and understanding how to manipulate JavaScript objects, you can efficiently update your data structures as needed.

Feel free to apply these techniques in your next project, and happy coding!