I know what this is about Abstract Factory pattern. But in example at
rubygarden we passing a class to factory and it creates an object from
it.
But how can i pass a text string to factory which will create an object
from it?
In later example: i wish to pass string "Foo" or "Bar" not Foo or Bar.


------ From rubygarden library of patterns ------
class Foo; end
class Bar; end

# Here is the use of the Abstract Factory pattern
def create_something( factory )
    new_object = factory.new
    puts "created a new #{new_object.class} with a factory"
end

# Here we select a factory to use
create_something( Foo )
create_something( Bar )

Running the code above results in the output:
created a Foo with a factory
created a Bar with a factory