From: ES <ruby-ml@...>
Date: 2005-02-20T10:12:47+09:00
Subject: Re: Dynamically loading and executing within a new module?


On 2/19/2005, "Lloyd Zusman" <ljz@asfast.com> wrote:

>Lloyd Zusman <ljz@asfast.com> writes:
>
>> ES <ruby-ml@magical-cat.org> writes:
>>
>>>
>>> [ ... ]
>>>
>>> If you don't just want to write an actual module and then call its #init,
>>> you could do something like this. Somewhat pseudo:
>>>
>>> Thread.new do
>>>   if fname
>>>     mod = eval fname.capitalize
>>>     data = File.new(fname, 'r') do |f|
>>>              f.read
>>>            end
>>>     mod.module_eval data
>>>     mod.send :init, args
>>>     # ...
>>>   end
>>> end
>>>
>>> Or sumptin :)
>>
>> Thanks.  This makes sense.
>>
>> However, the "eval fname.capitalize" part doesn't create a new module,
>> and that's part of what is confusing me about all this.  Given a string
>> "Foo", what do I do to it in order to create a module object with that
>> name?
>
>Actually, I now realize that I don't need a bona fide named module, but
>rather, just a way to associate a name with a module.  Therefore, I
>think that I can do it more or less like this:
>
>  modhash = Hash.new
>  if fname then
>    if modhash.has_key?(fname) then
>      mod = modhash[fname]
>    else
>      mod = Module.new
>      modhash[fname] = mod
>    end
>    data = File.new(fname, 'r') do |f|
>             f.read
>           end
>    mod.module_eval data
>    mod.send :init, args
>  end
>
>Does this make sense?

Yes, but I'm not sure if I understand why you're doing this in the first
place. Why don't you just create a named module, store it in a file and
load
it when requested instead of just storing the code that'll go in the
module?

> Lloyd Zusman

E