Determining if the closure of a lambda referencing an ivar is defined at time of creation, or time of calling.

lambda_closure_scope.rb

class Creator
  def initialize(input1)
    @input1 = input1
  end
  
  def create_lambda
    ->() {
      puts @input1
    }
  end
end

class Caller
  def initialize(input1, creator)
    @input1  = input1
    @creator = creator
  end
  
  def call_lambda
    @creator.create_lambda.call
  end
end

creator = Creator.new("creator input")
caller = Caller.new("caller input", creator)

caller.call_lambda
# >> creator input