Ruby - Block scope inside method

Question

I created some class

class Book
  def perform
    yield
  end
end

Then I want to call the block which will call method1 and method2. However both methods are defined nowhere and I dont want to define them. Instead of this I'd like to call method_missing but I get: undefined local variable or method 'method1' for main:Object (NameError)

book = Book.new
book.perform do
  method1
  method2
end

What Should I do then?

Sagar Pandya · Accepted Answer · 2016-08-22 17:57:37Z

1

In order to do what you ask I believe you need to redefine method_missing like so:

class Book
  def perform
    yield
  end
end

def method_missing(methodname, *args)
  puts "#{methodname} called"
end

book = Book.new
book.perform do
  method1
  method2
end

#=>
#method1 called
#method2 called

answered Aug 22, 2016 at 17:57

Sagar Pandya

9,5282 gold badges28 silver badges38 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

mike927 Over a year ago

Great answer, I've tried to overwrite the method_missing inside the class scope and It caused that I didn't work

Collectives™ on Stack Overflow

Ruby - Block scope inside method

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related