How to Create a New Array of Objects that Combines Two Keys in JavaScript

Learn how to combine two keys in JavaScript objects into a new array of objects with full names.
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How to Create a New Array of Objects that Combines Two Keys in JavaScript

In the world of programming, especially when working with JavaScript, manipulating arrays and objects is a common task. One interesting challenge developers often face is combining properties from existing objects into a new format. In this guide, we will explore a scenario in which we need to create a new array of objects, where each object consolidates two keys from an original array of objects into one meaningful property.

The Problem: Combining Two Keys into One Object Property

Suppose we have an array of user objects, where each object contains a firstName and a lastName key, as shown below:

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

Our goal is to transform this array into an array of objects that have a combined property called fullName. The desired outcome would look like this:

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

It’s essential to create a new object structure that accurately reflects the combined names without losing any data in the transformation process.

The Solution: Utilizing map()

To achieve this, we can make use of the map() method, which iterates over each element in an array and applies a function to transform it. Here’s a step-by-step breakdown of how to implement this solution:

Step 1: Define the Original Array

First, make sure you have defined your array of user objects:

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

Step 2: Map Over the Array to Create New Objects

Now, utilize the map() method to create a new array composed of objects that have the fullName property. Here’s how you can do it:

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

Step 3: Output the Result

After transforming the original array, you can log the result to verify that it meets the desired structure:

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

Complete Code Example

Here is the complete code that combines all the steps we discussed:

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

Conclusion

Creating a new array of objects by combining two properties is a straightforward process using JavaScript's built-in array functionality. By leveraging the map() method, we can efficiently generate new structures based on existing data. This method not only simplifies our code but also ensures clarity and maintainability.

In summary, the crucial points to consider are:

Use map() to iterate over the original array.

Return a new object with the desired structure for each item.

Use template literals to format the string properly.

Now, when faced with a similar challenge, you'll have the tools and knowledge to handle the transformation with ease!