Question

I have a set of classes with static methods. Example member of class set:

    class George

    def self.ugh()
            printf( "Hello world\n" )
    end # self.ugh()

    end # class george

I need to do the following, but I don’t have what I need.

    p George.object_id

The code I’m working with passes the class name (aka var). I’ve found a
solution that seems ugly, but it works.

    var = "George" # What I have
    cmd  = "#{var}.object_id"
    p eval( cmd ) # right object_id

I would think there’s a better way. Seems like ruby’s missing a
s_to_class() method.

The only other ideas I’ve found, that don’t work.

    klass = class << var; self; end
    p klass.object_id # wrong object_id

    klass = var.singleton_class()
    p klass.object_id # wrong object_id

Anyone know a better way to get a class object (aka receiver) from a
string/symbol?

Answer 1

ActiveSupport provides a constantize method, if you’ve got that available. Otherwise, use Module#const_get. See this question for more details.