Solving the TypeError in JavaScript: Analyzing an Array of Objects with Math.max

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Understanding the Challenge: Analyzing an Array of Objects

When working with arrays of objects in JavaScript, you often need to extract specific information and compute values based on certain criteria. One common task is to find the maximum value of a specific property within a filtered subset of these objects.

Problem Overview

The initial setup includes an array of NEO objects. Each object holds several properties, including:

designation: The unique identifier for the NEO.

h_mag: The absolute magnitude of the NEO.

pha: A boolean indicating if the NEO is classified as a PHA.

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

This happens because of how the filtering and mapping functions were set up.

Solution: Correcting the Code

To resolve the issue, we need to follow these steps:

Filter the Array to Only Include PHAs.

Map the Resulting Array to Extract the h_mag Values.

Let's break down the corrected solution:

Step 1: Modify the Filtering Function

Instead of merely logging results, modify the filterByPHA function to return an array of objects that meet the criteria (PHAs). Here's the code:

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

Step 2: Calculate Maximum h_mag

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

Final Code Example

Here’s the complete example bringing it all together:

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

Conclusion

With this knowledge, you can continue exploring and processing complex datasets like the fascinating world of Near-Earth Objects!