How to Extract Values from JavaScript Objects and Modify Them Dynamically

A step-by-step guide on how to extract numbers from object values in JavaScript and add them to a new key-value pair. Perfect for developers looking to manipulate data structures easily.
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How to Extract Values from JavaScript Objects and Modify Them Dynamically

In the world of web development, handling data structures efficiently can significantly boost your productivity. Imagine you have a JavaScript object returned from a fetch request, and you need to extract specific pieces of information from it. This post will guide you through the process of extracting numbers from one property and adding them as new key-value pairs to enhance your data structure.

The Problem

Let's say you're working with a data object that contains multiple records, and each record has a ref property that encodes important identifiers. For example, with the following object:

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

You want to extract the three digit codes (011 and 005 in this case) from the ref property and add them as new key-value pairs in each corresponding object.

The Solution

Step 1: Understanding the Structure

Each object in the array contains a ref property formatted as:

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

Where XXX represents the code we want to extract.

Step 2: Using the map() Function

To achieve our goal, we will use the map() function to iterate through the array and transform each object. Here's how you can do it:

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

Breakdown of the Code:

({ ref, ...more }) - This destructures each object to separate the ref property from the rest. The rest of the properties are collected in the more object.

Step 3: Printing the Result

After the transformation, your newData array will have the original properties with an added Code property.

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

Final Output Example

Executing the above code will yield the following result:

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

Conclusion

By following the steps outlined in this post, you can efficiently extract specific values from JavaScript objects and restructure them as needed. This technique is valuable for any developer looking to manage and manipulate data returned from API calls effectively. Remember, understanding how to work with JavaScript objects can unlock your ability to create more dynamic and efficient applications.

Feel free to utilize this approach in your projects and enhance your data manipulation skills in JavaScript!