How to Correctly Assign Variables to an Array in p5.js

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The Problem

Consider a situation where you try to assign the value of winMouseX to the first position in your iconsx array. You might write something like the following in your draw() function:

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The logic behind your thought process was correct; you wanted to store the mouse's X-coordinate in your array, but the way it was implemented was flawed.

The Solution

1. Understand Variable Declaration

The main error stems from misunderstanding variable scopes and declarations:

Declaration Keywords: Don’t use let or var when you're trying to assign a value to an already declared variable. For instance, instead of:

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You should simply write:

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2. Clean Up Your Code

Properly formatting your code can help you spot errors more quickly. Indentation and spacing make your logic clearer. Here’s a corrected version of your code:

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

3. Key Takeaways

Don’t redeclare existing variables: Just assign values directly without repeating let or var.

Testing: Always run your code after making changes to ensure that each part functions as expected without errors.

Conclusion