Why there are always fixed object_id s for Boolean objects?

If you find the below test,you would see that, object_ids are always
same for the three objects - true,false and nil.

Why for these objects object_id s are not allocated in run time?

true.object_id
=> 2

false.object_id
=> 0

nil.object_id
=> 4

‘a’.object_id
=> 17515344

nil.object_id
=> 4

‘a’.object_id
=> 18433428

false.object_id
=> 0

‘a’.object_id
=> 18454176

true.object_id
=> 2

Because they refers to constants created when the VM arise, always.

nil.==(NIL)
true.==(TRUE)
false.==(FALSE)

Perhaps could be a better explanation.

As usual

http://ruby-doc.org/core-2.0/TrueClass.html

John

object_ids are also the same for Fixnum objects

its a feature not a bug

PS: but they can differ between different ruby versions

(in 2.0 little floats are also have fixed ids)