Superfluous use of instance_exec

gistfile1.txt

module M
  def m1
    puts "hi from M"
  end
  
  def handle(&block)
    block.call
  end

  def handle2(&block)
    # No need for instance_exec here since the block
    # that is passed in recorded 'self' to be the
    # class that extended M, i.e. "C"
    instance_exec(&block)
  end
end

class C
  extend M

  # Blocks are closures and capture value of 'self' here,
  # which in this case is C. C extends M, so M's instance
  # methods become available to C as "class methods"
  handle { m1 }

  handle2 { m1 }
end