Ruby procs

ruby_proc.rb

class Worker
  def hello(work)
    work.call
  end

  def name(n)
    "Worker #{n}"
  end
end

class Master
  def test
    w = Worker.new
    w.hello Proc.new {
      puts name("Kasper")
    }
  end
end

m = Master.new
m.test

Gives this output:

ruby_proc.rb:15:in `block in test': undefined method `name' for #<Master:0x007fa39eff3ea0> (NoMethodError)
    from ruby_proc.rb:3:in `call'
    from ruby_proc.rb:3:in `hello'
    from ruby_proc.rb:14:in `test'
    from ruby_proc.rb:21:in `<main>'

This fixed my issue:

class Worker
  def hello(&block)
    instance_eval &block
  end

  def name(n)
    "Worker #{n}"
  end
end

class Master
  def test
    w = Worker.new
    w.hello { puts name("Kasper") }
  end
end

m = Master.new
m.test