What are some interesting functional programming challenges I can try?

What are some interesting functional programming challenges I can try?

Here are a few challenges you might enjoy:

1. Implement the Fibonacci sequence using recursion.
2. Create a function to find the longest word in a list.
3. Write a program to filter out even numbers from a list.

Can you explain how to solve the Fibonacci sequence challenge?

Sure! To solve the Fibonacci sequence challenge using recursion, you can define a function that calls itself to calculate the nth Fibonacci number. Here's a simple example in Python:

def fibonacci(n):
    if n <= 1:
        return n
    return fibonacci(n-1) + fibonacci(n-2)

What are some common pitfalls when using recursion?

Common pitfalls include:

1. Not defining a base case, which can lead to infinite recursion.
2. Excessive memory usage due to deep recursion.
3. Performance issues with overlapping subproblems, which can be mitigated using memoization.

Can you suggest a more advanced challenge?

Absolutely! Try implementing the MapReduce algorithm in a functional programming style. It involves creating a map function to transform data and a reduce function to aggregate results.