How to Retrieve Object Values Using Keys from Another Object in TypeScript

Discover a step-by-step method to get values from one object using keys from another object in TypeScript and Angular.
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How to Retrieve Object Values Using Keys from Another Object in TypeScript

When working with JavaScript or TypeScript, you may encounter scenarios where you need to access values from one object based on keys that are defined in another object. This problem can be common, especially in dynamic applications. In this guide, we will explore how to achieve this using two example objects. Let’s dive into the problem and solution in a structured manner.

The Problem Statement

Let's consider two objects, object1 and object2, in your TypeScript application:

object1 Value:

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

object2 Value:

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

Your challenge is to extract a value from object1 using the key specified in object2, particularly the fee_category_Name, which in this case is "Old Admission". The existing attempt provided seems to be running into issues. Let's dissect the solution to understand how to fix it.

The Current Attempt and Its Flaws

Your original approach tries to iterate over both objects and check for key existence, but it is not correctly structured. Here's the problematic part of your code:

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

This code structure has a few issues:

It does not directly map object2's key names to object1.

A Better Approach to Solve the Problem

To correctly retrieve the values from object1 based on the keys from object2, we can rewrite the iteration as follows:

Step-by-Step Solution

Check Existence in object1: For each key from object2, check if it exists in object1.

Retrieve the Value: If it exists, retrieve the corresponding value.

Here’s the corrected code structure:

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

Explanation of the Code

const categoryName = object2[key];: Retrieves the actual key name from object2.

const value = object1[categoryName];: If true, it retrieves the value from object1 using the key from object2.

Conclusion

Accessing object values based on another object's key can seem tricky at first, but by understanding the properties and how they map, you can effectively retrieve what you need. The solution outlined here provides a clear and concise method to achieve that in TypeScript. Whether you're working on a simple project or a larger Angular application, these principles will help you manage dynamic objects more efficiently.

Feel free to implement the above solution and modify it according to your specific use case! If you have any further questions, please share them in the comments below.