What are some practical use cases for closures in Ruby?

What are some practical use cases for closures in Ruby?

Closures in Ruby are often used for encapsulating behavior, such as in callbacks, event handling, and creating DSLs.

Can you give me an example of a closure in a Ruby method?

Sure! Here's a simple example:

def make_multiplier(factor)
  return lambda { |x| x * factor }
end

double = make_multiplier(2)
puts double.call(5)  # Outputs: 10

How do closures help with memory management in Ruby?

Closures can help manage memory by allowing you to create functions that retain access to their surrounding context, reducing the need for global variables.

Are there any performance considerations when using closures?

Yes, closures can introduce overhead due to the additional scope they create, so it's important to use them judiciously.