How do I debug scope issues in Ruby?

How do I debug scope issues in Ruby?

Debugging scope issues in Ruby often involves understanding variable visibility. Can you provide a specific example?

I have a variable defined in a method, but I can't access it outside of that method.

This is likely due to Ruby's method scope. Variables defined inside a method are local to that method. You can return the variable or use instance variables.

What are instance variables and how do they work?

Instance variables are prefixed with '@' and are accessible across methods in the same instance of a class. They maintain state.

Can you show me an example of using instance variables?

Sure! Here's a simple example:

class Example
  def initialize(value)
    @value = value
  end

  def display_value
    puts @value
  end
end

obj = Example.new(10)
obj.display_value  # Outputs: 10