How to know what class are there in a script file?

[Magicloud Wang]

Dear,
I mean after I 'load' or 'require' a file, How to know what classes I have
got?

Thanks.

 

[Oscar Del ben]

Dear,
I mean after I 'load' or 'require' a file, How to know what classes I
have
got?

Thanks.

I think there's no way of doing that, you can view the methods for a
class or object if you want

Oscar

 

[Frederick Cheung]

I think there's no way of doing that, you can view the methods for a
class or object if you want

activesupport has something like that. Have a look at
Dependencies#new_constants_in

Fred

 

[BiHi]

The activesupport Dependency thing is really nice since it works with
any constant, but if you really want the classes only, this seems to
do the trick:

require 'enumerator'

klasses_before = Enumerable::Enumerator.new(ObjectSpace, :each_object,
Class).to_a

require 'open-uri'

new_klasses = Enumerable::Enumerator.new(ObjectSpace, :each_object,
Class).to_a - klasses_before

p new_klasses

 

[Magicloud Wang]

Dear,
I think this disappeared in rails 2?

Thanks.

 

[Magicloud Wang]

Dear,
I will try this.

Thanks.

 

[Frederick Cheung]

Dear,
I think this disappeared in rails 2?

Nope, definitely still there. Was fiddling with it just a few days ago.

Fred

Thanks.