Change the binding of a Proc in Ruby

Question

I have this code:

 l = lambda { a }
 def some_function
     a = 1
 end

I just want to access a by the lambda and a special sco

Answer 1

class Proc
    def call_with_obj(obj, *args)
        m = nil
        p = self
        Object.class_eval do
            define_method :a_temp_method_name, &p
            m = instance_method :a_temp_method_name; remove_method :a_temp_method_name
        end
        m.bind(obj).call(*args)
    end
end

And then use it as:

class Foo
    def bar
        "bar"
    end
end

p = Proc.new { bar }

bar = "baz"

p.call_with_obj(self) # => baz
p.call_with_obj(Foo.new) # => bar