Injecting an value into a binding

inject_this.rb

def inject_this_as_reference(block, this_object)
  block.binding.eval("lambda {|v| @this = v}").call(this_object)
end

def inject_this_as_method(block, this_object)
  block.binding.eval('self.singleton_class').send(:define_method, :this) {this_object}
end

fn = lambda { "this is #{@this}"}
inject_this_as_reference fn, "Radical!" #=> This is Radical!
puts fn.call()

fn = lambda { "this is #{this}"}
inject_this_as_method fn, "Awesome!" #=> This is Awesome!
puts fn.call()