What are advanced closures in Ruby?

What are advanced closures in Ruby?

Advanced closures in Ruby refer to the use of blocks, procs, and lambdas to create flexible and reusable code.

Can you explain the difference between procs and lambdas?

Sure! Procs are more flexible with arguments and can return from the enclosing method, while lambdas enforce argument count and return to the calling method.

How do closures help in functional programming?

Closures allow functions to capture and remember their lexical scope, enabling powerful functional programming techniques like higher-order functions.

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

Absolutely! 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