How to Merge Object Data with an Array of Objects in JavaScript

Learn how to effectively combine an array of objects with corresponding data from a plain object in JavaScript using simple techniques.
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Combining Object Data with an Array of Objects in JavaScript

When working with JavaScript, you may often face the challenge of merging different kinds of data retrieved from APIs. In this guide, we will tackle the problem of combining an array of objects with a plain object that acts as a dictionary or map. This scenario is common when you need to enrich your data structures and provide more comprehensive information based on keys.

The Problem

Imagine you have two sets of data:

An array of objects containing labels and prices:

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

A plain object that serves as a map, where each label is associated with a count:

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

Our goal is to merge these two data sets based on the label, yielding a result that looks like this:

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

The Solution Overview

To achieve this merging, we can use JavaScript array methods like map() alongside the spread operator. Here's a breakdown of the solution:

1. Declaring the Data

Start by defining the array and the object:

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

2. Merging the Data

Next, we will use the map() function to iterate over each object in the data array and combine it with the corresponding count from the counts object. This can be done as follows:

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

Explanation

3. Logging the Result

Finally, you can log the result to see the merged data:

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

Complete Code Example

Here’s the complete JavaScript code snippet for better understanding:

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

Conclusion

Combining data from different structures is a fundamental skill in JavaScript programming. By utilizing methods like map() and the spread operator, you can efficiently merge an array of objects with corresponding data from a plain object. This technique not only simplifies your code but also enhances the readability and maintainability of your programs.

Happy coding!