Скачать или смотреть How to Combine Arrays of Objects Based on Matching IDs in TypeScript

Learn how to effectively merge properties from two arrays of objects in TypeScript using employee IDs as the matching criteria.
---
This video is based on the question https://stackoverflow.com/q/75287669/ asked by the user 'noclist' ( https://stackoverflow.com/u/1819315/ ) and on the answer https://stackoverflow.com/a/75288281/ provided by the user 'Stewart' ( https://stackoverflow.com/u/7014375/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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: Combine arrays of objects based on Ids

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Merging Arrays of Objects in TypeScript

In modern web development, working with data often requires us to manipulate arrays and objects efficiently. A common scenario arises when you need to combine arrays of objects based on matching IDs. This can be especially relevant in applications dealing with user data, employee records, or any structured data where relationships exist. In this article, we will tackle how to add the status property from one array of objects into another based on matching employeeId with id.

The Problem

Consider the following two arrays of objects:

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

We want to enrich the object2 array by adding the status from object1 where the employeeId from object1 matches the Id from object2. The end result would be similar to this:

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

How can we accomplish this? Let's break down the solution step by step.

The Solution

Step 1: Loop through object2

We will iterate through each element of object2 using a for loop. This allows us to focus on each employee to find their corresponding status.

Step 2: Find the matching object in object1

For each item in object2, we will use the find method to locate the matching object in object1 where employeeId corresponds to the Id of the employee in object2.

Step 3: Merge the two objects

If a match is found, we will use the spread operator to merge the original properties of the object in object2 with the status from the matched object in object1.

Sample Code Implementation

Below is the TypeScript code that implements the steps outlined above:

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

Conclusion

By following these steps, we efficiently combined the two arrays of objects based on matching IDs, enriching the object2 with necessary data from object1. This technique is quite useful in various applications, ensuring our data structures are coherent and meaningful. Whether you're a beginner or looking to refresh your skills, mastering this approach can significantly enhance your TypeScript proficiency.

Now that you have this method in your toolkit, you can apply it on different datasets across your projects. Happy coding!