Subdev_spec index

Please
Is there anyone who could tell me what do those subdev_spec index stans
for in thefollowing statement?:
subdev_spec = (0, 1)

I did some googling and there are lots of examples about it
But i couldnt find the meanings of those indexes

Thank you

Sent from my iPad

This forum is not affiliated to the Ruby language, Ruby on Rails framework, nor any Ruby applications discussed here.

| Privacy Policy | Terms of Service | Remote Ruby Jobs