How to Dynamically Assign Values to Keys in JavaScript Objects with Ease

Discover how to efficiently iterate over objects and dynamically assign values to keys in JavaScript. Learn the steps with practical code examples.
---

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: how to iterate over object and dynamically assign values to keys

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Mastering Object Iteration in JavaScript

If you're delving into JavaScript and tackling object manipulation, you might encounter scenarios where you need to extract data from an object and convert it into a new format – such as an array of objects. This might sound tricky, especially if you're unfamiliar with JavaScript's methods. But worry not! In this guide, we’ll break down how to dynamically assign values to keys in objects with an easy-to-follow example.

The Problem

Let’s say you have an object containing keys and values. Your goal is to iterate through the object and transform it into a new array of objects. Here’s the example object we'll start with:

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

From this sourceObj, you want to create a series of new objects within an array that looks like this:

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

At first glance, this task might seem daunting, particularly if you’re unfamiliar with iterating through objects. Let’s explore a solution that employs JavaScript’s built-in capabilities effectively.

The Solution

Map the keys to a new format: Use .map() to iterate over these keys and return a new object for each key.

Here’s the Code

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

Breakdown of the Code

.map((key) => {...}): For each key, the provided function returns a new object.

The returned object: Each object contains:

foo: a constant string "foo".

year: dynamically assigned from sourceObj using the corresponding key.

bar: another constant string "bar".

Conclusion

Feel free to implement this technique in your own projects, and soon you'll be adept at manipulating JavaScript objects like a pro! Happy coding!