How can I improve performance using map and filter in Ruby?

How can I improve performance using map and filter in Ruby?

You can improve performance by using map and filter efficiently. Instead of chaining them, consider using each_with_object.

Can you show me an example of that?

Sure! Instead of doing array.map { |x| x * 2 }.filter { |x| x > 5 }, you can do:

array.each_with_object([]) do |x, result|
  doubled = x * 2
  result << doubled if doubled > 5
end

What are the benefits of this approach?

This approach reduces the number of iterations over the array, which can significantly improve performance, especially with large datasets.

Are there any other methods to optimize Ruby code?

Yes, you can also look into using select and map together, or leveraging lazy enumerators for large collections.