How to Easily Merge Two Objects in an Array Using JavaScript

Learn how to merge objects in an array using JavaScript and output the desired result effectively.
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How to Easily Merge Two Objects in an Array Using JavaScript

The Problem

Consider the following scenario: you have an array called skills that contains two objects, each representing a skill with its corresponding ID and name. Here’s what the array looks like:

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

Your goal is to merge these objects in such a way that you can output a single string that contains both skill names, separated by a comma. The desired output should look like this:

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

If you attempted to use a method like merge() but found it ineffective, you’re in the right place! Let's explore a better solution together.

The Solution: Using map()

To achieve the desired output, we can leverage the map() function in JavaScript. The map() method creates a new array populated with the results of calling a provided function on every element in the calling array. Let's break this down into steps.

Step 1: Extracting Skill Names

First, you'll want to extract the names of the skills from each object in the array. Here’s how you can do it:

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

In this code snippet:

We use the map() function to iterate through each object in the skills array.

Inside the callback function, we access the skill_name property of each object, creating a new array values that contains just the skill names.

Step 2: Joining the Array Elements

Now that we have an array of skill names, we can combine them into a single string. This can be done using the join() method:

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

In this step:

The join() method joins all elements of the values array into a single string.

We specify the string ', ' as the separator, which places a comma and a space between each skill name.

Final Code

Combining both steps, your complete code would look like this:

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

Conclusion

Merging objects from an array in JavaScript doesn’t have to be complicated. By using the map() method to extract the relevant information and then the join() method to combine that information, you can easily transform an array of objects into a well-formatted string.

Now, the next time you encounter a similar task, you have a straightforward solution at hand. Happy coding!