Add e method "inline" to an object?

[Iñaki Baz Castillo]

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[Florian Gilcher]

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I'll explain it by example:

a =3D "a"
#=3D> "a"
class << a
def fooify
return "foo #{self}"
end
end

a.fooify
#=3D> "foo a"
b =3D "b"
#=3D> "b"
b.fooify
#NoMethodError: undefined method `fooify' for "b":String
# from (irb):9
# from :0

Hi, I know that I can extend a Class instance (an object) with a
method(s) by doing:

object.extend Module

but can I do it in a "inline" way without the need of a module?
I just want something as follows:

time =3D Time.now
object.add_method 'def say_time(); return time; end'

irb> object.say_time
--> time

Note that I **don't** want to include the "add_method" in object class
or in Object class. This is, I don't want to "dirty" object class.

Also note that I can't use "object.extend Module" since the method
"say_time" must return a variable "time" value that I pass as an
argument.

Is there some way? Thanks a lot.


--=20
I=F1aki Baz Castillo
<[email protected]>

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[Michael Granger]

Hi, I know that I can extend a Class instance (an object) with a
method(s) by doing:

object.extend Module

but can I do it in a "inline" way without the need of a module?
I just want something as follows:

time =3D Time.now
object.add_method 'def say_time(); return time; end'

irb> object.say_time
--> time

You can do this with singleton methods:

irb(main):001:0> object =3D Object.new
=3D> #<Object:0x304af8>

irb(main):002:0> def object.say_time; Time.now; end
=3D> nil

irb(main):003:0> object.say_time
=3D> Wed Aug 20 10:13:29 -0700 2008

 

[Iñaki Baz Castillo]

El Mi=E9rcoles, 20 de Agosto de 2008, Michael Granger escribi=F3:

You can do this with singleton methods:

irb(main):001:0> object =3D Object.new
=3D> #<Object:0x304af8>

irb(main):002:0> def object.say_time; Time.now; end
=3D> nil

irb(main):003:0> object.say_time
=3D> Wed Aug 20 10:13:29 -0700 2008

Thanks to both


=2D-=20
I=F1aki Baz Castillo