Consider a function that fetches user data from an API. How can this function be refactored to adhere to the principles of pure functions?
- Return the fetched data directly
- Introduce a callback for data processing
- Include a random delay in fetching data
- Use global variables for storing the fetched data
To make the function pure, it should return the fetched data directly without relying on external state or global variables. Introducing a callback or using global variables can introduce side effects, which contradicts the principles of pure functions.
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