"false", "true", and "nil" have ids?

[Daniel]

I somehow ended up using something like "p @var.id" in one of my scripts, but @var was a variable that equalled nil, and it always showed 4. false shows 0, true shows 2, and nil shows 4. I used this in a script:

p false.id, true.id, nil.id

I was curious and wondered why. Does anyone know?

 

[Mr.Mo]

ruby is object oriented and there for everything is an object and has an id.

 

[Daniel]

I feel dumb for asking now. What are the specific ids for?

 

[SephirothSpawn]

If you look in class Object, under object#id, it is the same thing as object#object_id...

So checking object#object_id, whcih returns the object identifier. No 2 objects will share the same id.

class Something
end

a = Something.new
b = Something.new
c = Something.new


p a.object_id, b.object_id, c.object_id

# Gives
538394172
538394152
538394142