ActionScript-like "with" for Ruby, result of SO discussion

with.rb

module Kernel
  def with(obj, &block)
    obj.instance_eval &block
    obj
  end
end

with_example.rb

module Kernel
  def with(obj, &block)
    obj.instance_eval &block
    obj
  end
end

class Person
  attr_accessor :name, :example
end

tester = with(Person.new) do
  self.name = "Andy"
  self.example = "Example"
end

puts "#{tester.name}:#{tester.example}"

That makes sense. Thank you very much for explaining this in detail!