Today I learned about the method __id__, aliased object_id, in Ruby. It
returns a unique integer identifier for any Ruby object.
A few examples:
> Object.new.object_id
=> 7024702983434
> name = "jake"
=> "jake"
> name.object_id == name.object_id
=> true
> "thawed".object_id == "thawed".object_id
=> false
> "frozen".freeze.object_id == "frozen".freeze.object_id
=> trueI've never used this method in practice, but I hope to someday.