what's object_id in irb?

[Massimo Donati]

Hi everyone i'm running this lines of code:

[home/] irb
2.0.0p0 :001 > object_id
=> 70156571578960


I can't really understand what is this object_id referred to since is not called from any object?

Thanks very much!
Massimo

 

[Robert Klemme]

Hi everyone i'm running this lines of code:

[home/] irb
2.0.0p0 :001 > object_id
=> 70156571578960


I can't really understand what is this object_id referred to since is not called from any object?

It is:

irb(main):001:0> object_id
=> -1073529238
irb(main):002:0> self
=> main
irb(main):003:0> self.object_id
=> -1073529238

Note: self - as any variable - _always_ (no exception!) references an
instance.

Cheers

robert