From: "David A. Black" <dblack@...>
Date: 2009-01-24T10:41:12+09:00
Subject: Re: instantiate a class dynamically

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Hi --

On Sat, 24 Jan 2009, F. Senault wrote:

> Le 24 janvier 2009 =E0 02:12, rpardee@gmail.com a =E9crit :
>
>> Hey All,
>>
>> If I have the name of a class in a string var, is it possible to get a
>> new instance of that class (and if so, how)?  The following do *not*
>> work:
>>
>>   my_string =3D "Hash"
>>
>>   my_object =3D Class(my_string)
>>   my_object =3D Class.new(my_string)
>>   my_object =3D Object.new(my_string)
>
> my_object =3D Object.const_get(my_string.to_sym).new
>
> (The to_sym is mandatory in ruby 1.9.)

I don't think so:

   $ ruby19 -ve 'p Object.const_get("String")'
   ruby 1.9.1 (2008-12-30 patchlevel-0 revision 21203) [i386-darwin9.5.0]
   String


David

--=20
David A. Black / Ruby Power and Light, LLC
Ruby/Rails consulting & training: http://www.rubypal.com
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