How to Properly Access bytes from an Object Returned by loadBytes() in P5.js

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In this guide, we will delve into this problem, understand why it occurs, and provide a step-by-step solution to effectively access the bytes property of the object.

The Problem Scenario

Let's consider a simple example. You want to read a file from an input element and access its bytes using the loadBytes() function:

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

Solution: Using Callbacks for Asynchronous Data

Modifying the Code

Here’s how to correctly implement the solution step by step:

1. Update the get_rom() Function

You need to modify the get_rom() function to accept a callback and call it once the loadBytes() operation is complete:

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2. Update the loadarom() Function

Now, you will pass a callback function to get_rom() that handles the results once they are ready:

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

3. Complete HTML Implementation

Here’s how the complete structure including HTML looks:

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4. Putting It All Together

Your full JavaScript code becomes:

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Conclusion

Feel free to experiment with this approach in your own projects, and embrace the power of asynchronous programming!