From: Brian Candler <b.candler@...>
Date: 2010-03-12T04:11:04+09:00
Subject: Re: Dynamically require and include code in application

R. Kumar wrote:
> Since include has a problem (NoMethod)

What do you mean by this? Show your code.

Remember that 'include' has nothing to do with loading code. All it does 
is make the methods of one module available in another class. Use 
'require' to load code.

module Foo
  def say_hello
    puts "hello"
  end
end

class Bar
  include Foo
end

Bar.new.say_hello

> i tried making the method Class
> level,
>  it works but include does not take a String

include takes a Module. If you want to do it dynamically, use const_get.

include Object.const_get("Foo")    # include ::Foo

include Wibble.const_get("Bar")    # include Wibble::Bar

> I was hoping that the require and include could be at the instance
> level, so other objects are not affected.

Then maybe you want 'extend' rather than 'include'. 'extend' adds 
instance methods from a module to a single object.

# with module Foo defined as above

a = "hello"
a.extend Foo
a.say_hello  # says hello

b = "hello"
b.say_hello  # NoMethodError

HTH,

Brian.
-- 
Posted via http://www.ruby-forum.com/.