How to Combine Two Objects with Same Properties into an Array Value in JavaScript

Learn how to effortlessly merge two JavaScript objects based on common properties, resulting in a structured array format.
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Combining Two Objects with Same Properties to Array Value in JavaScript

In JavaScript, managing and manipulating objects can sometimes feel like a complex puzzle, especially when you want to combine data from two different objects based on a common property. In this guide, we’ll explore how to merge two objects such that their properties are combined into array values, given a specific condition.

The Problem

Imagine you have two JavaScript objects where the second object's keys represent a property of the first object. Here's an example of how your objects look:

Object 1 (OBJ1):

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

Object 2 (OBJ2):

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

Your goal is to create a new array that merges the properties of these two objects based on the projectID field from OBJ1, resulting in a structured format where the properties from both objects are combined into arrays. The desired output should look like this:

Desired Result:

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

The Solution

Step-by-Step Breakdown

To achieve the desired result, we will create a function that processes both objects and merges them accordingly. Here’s how we can implement this in a clean and organized manner:

Define the Function: Create a function that takes the original array (OBJ1) and the additional data (OBJ2) as arguments.

Map through the Original Array: Use the map method to iterate over each item in the original array.

Access Additional Properties: For each item, we retrieve the additional properties from the second object based on the projectID.

Create a New Object for Each Item: Construct a new object that includes the projectID and combines properties into arrays.

Implementation

Here’s the code that implements the solution:

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

Explanation of Code

Function Definition: The mergeObjects function takes originalArray and additionalData as input parameters.

Mapping Over the Array: Inside the function, we use map to create a new array based on the transformation we apply to each object in originalArray.

Accessing Additional Properties: We fetch the relevant properties from additionalData using the projectID.

Constructing New Objects: The new object structure includes arrays for each property, combining both the original and additional data.

Conclusion

Merging two objects based on a common property in JavaScript can be achieved succinctly using built-in methods like map. In this guide, we've walked through the problem step-by-step and provided a clear solution that you can implement in your own projects. Now, you can easily manipulate and combine object data as per your requirements!

If you have any questions or need further clarification, feel free to leave a comment! Happy coding!