How to Change Values Inside an Array of Objects in JavaScript

Learn how to effectively change property names in an array of objects, using the JavaScript `map()` method for better data handling.
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Introduction

Working with arrays of objects is a common task in JavaScript. However, sometimes you may need to modify the structure of the data, such as changing property names. A common scenario might involve converting values like lat and lng to Lat and Long. In this guide, we will explore how to efficiently achieve this using the map() function.

Understanding the Problem

Consider this array of objects representing geographical coordinates:

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

The Goal

We want to change the lat and lng properties to Lat and Long, respectively. Let's see how to properly implement this using the right approach in JavaScript.

The Solution

Using the .map() method is the ideal choice for this task. Instead of thinking of it as modifying existing objects, think of map() as projecting the original array into a new array with a different structure.

Step-by-Step Breakdown

Create a New Array:
Use the map() method to iterate over each object in the original array.

Return New Objects:
For each object, return a new object with the desired property names (Lat and Long).

The Code

Here's how the solution looks in code:

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

Explanation of the Code

For each object c, we create a new object:

This results in newArr being an array of new objects with the updated keys.

Important Note

The .map() method does not modify the original array; it instead creates a new array containing the modified objects. This is a key feature of map() that keeps your data immutable.

Conclusion

Changing property names in an array of objects may seem challenging at first, but JavaScript's map() method makes it a breeze. By projecting the original data into a new structure, we maintain clean and readable code. This method not only simplifies the manipulation of your data but also enhances the maintainability of your codebase.

Now that you know how to change values inside an array of objects, you can implement similar changes in your projects with ease. Happy coding!