How to Access a Specific JSON Object by Name in Angular Using ngx-charts

Learn how to merge multiple JSON objects in Angular and access their properties using a function. Perfect for data visualization with ngx-charts!
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How to Access a Specific JSON Object by Name in Angular Using ngx-charts

When working with data-driven applications in Angular, you might find yourself needing to display different sets of data dynamically. One common scenario involves dealing with JSON data that contains multiple objects. If you're using a library like ngx-charts to visualize that data, you might run into challenges when trying to access specific objects by their names. In this guide, we're going to break down how to effectively merge multiple JSON objects into one data source and then access them using simple functions.

The Problem: Accessing a Specific JSON Object

In a recent coding endeavor, I was successfully plotting a single JSON object on a chart using ngx-charts. However, when I decided to merge multiple JSON objects into one data source, I encountered an issue. Specifically, I was attempting to display the first data object (named DATA1) in my chart by using the property notation multiple[0].data1. Unfortunately, I received an error stating that the property data1 does not exist.

Initial Setup

Here’s a simplified version of what I was initially working with:

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

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

The Error

Once I tried merging the JSON objects and using multiple[0].data1, I received the error about the non-existing property. This realization prompted me to find a better way to access the desired data by name.

The Solution: Accessing JSON Object by Name

To effectively access the desired JSON object by its name, I implemented a function in my component that will allow for easier access to these merged data entries based on their name. Here’s how it can be done:

Step 1: Modify the Data Structure

First, I prepared my JSON data structure such that it's organized in an array as follows:

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

Step 2: Create a Function to Retrieve the Data

Now, I will create a function called getData(name) that retrieves the specific data object based on the provided name:

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

This function uses the find method to locate the object that matches the desired name and wraps it in an array.

Step 3: Update the HTML to Use the New Function

Now that the function is ready, I updated my HTML to call this function instead of trying to access the property:

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

Conclusion

By implementing the steps laid out in this guide, you can seamlessly merge multiple JSON objects in Angular and access them dynamically based on their names. This way, you enable your application to be far more flexible and reusable, making your data visualization with ngx-charts a lot more powerful.

Feel free to try this method in your Angular projects, and let me know if you encounter any issues or have further questions!