Скачать или смотреть How to Extract Category from JSON Objects in Angular Using .then

Learn how to efficiently extract the `Category` values from a JSON array of objects in Angular using the `.then` method, making your data handling process seamless and effective.
---
This video is based on the question https://stackoverflow.com/q/67209571/ asked by the user 'A. B' ( https://stackoverflow.com/u/9287931/ ) and on the answer https://stackoverflow.com/a/67210095/ provided by the user 'okihnjo' ( https://stackoverflow.com/u/13051803/ ) 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: How to show Contents.Category array in object using .then

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.
---
How to Extract Category from JSON Objects in Angular Using .then

When working with JSON data in Angular, you may come across situations where you need to extract specific values from an array of objects. One common scenario is when you have a JSON array returning from an API call, and you only want to retrieve the values of a specific property—in this case, the Category. If you are struggling with how to achieve this using the .then method, you are in the right place!

In this guide, we will explore how to easily extract the Category values from an array of JSON objects that you might receive from a backend service.

Understanding the Problem

You are presented with a JSON array similar to this:

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

You need to extract the Category values from this array after fetching the data using a service in Angular. In your code, you utilized the .then method to handle promises, but you are unsure how to effectively collect the Category values.

Solution: Extracting Category Values

The solution to extracting the Category from your JSON array involves iterating over the array and pushing the Category values into a new array. Below, we will break down the steps required to accomplish this.

Step 1: Fetching the Data

First, you need to ensure that you are fetching the data correctly using your service's method, as shown below:

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

Step 2: Extracting the Category Values

Now that you have successfully retrieved and stored the data in this.CrewDataContents, the next step is to extract just the Category values. Here’s how you can do that:

Create a new array to hold the Category values.

Iterate over the CrewDataContents and push each Category value into this new array.

Here’s the code that achieves this:

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

Output

When you log the categoryData array, you will see the desired output:

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

This output clearly contains all the Category values extracted from your JSON array.

Conclusion

Extracting specific fields from a JSON array in Angular is straightforward once you understand the process. By using the .then method to handle the promise returned by your data service, you can efficiently extract properties like Category by iterating through your data and pushing the desired values into a new array.

With this knowledge in hand, you can enhance your data handling in Angular applications, ensuring that you can access and manipulate data in a way that best suits your needs. Happy coding!