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

ruby-talk
1

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

Thanks.

2

Magicloud Wang wrote:

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

···

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3

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

Fred

···

On 25 Dec 2007, at 10:40, Oscar Del ben wrote:

Magicloud Wang wrote:

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

4

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

5

Dear,
  I think this disappeared in rails 2?

Thanks.

···

On 2007年12月25日Tuesday 19:19:11 Frederick Cheung wrote:

On 25 Dec 2007, at 10:40, Oscar Del ben wrote:
> Magicloud Wang wrote:
>> 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

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

Fred

6

Dear,
  I will try this.

Thanks.

···

On 2007年12月25日Tuesday 19:50:09 BiHi wrote:

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

7

Dear,
  I think this disappeared in rails 2?

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

Fred

···

On 25 Dec 2007, at 20:52, Magicloud Wang wrote:

Thanks.

On 2007年12月25日Tuesday 19:19:11 Frederick Cheung wrote:

On 25 Dec 2007, at 10:40, Oscar Del ben wrote:

Magicloud Wang wrote:

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

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

Fred