On Wed, Aug 12, 2009 at 10:25 PM, Ruby on Rails<[email protected]> wrote: > > Thanks Fred , > > I am not getting that concept of ruby . We have nil.object_id is 4 > ,are they fix for every value, i am not sure for this .
No, not in general, and the real story is rather dependent on the particular Ruby implementation. If we are talking the MRI (or Matz' Ruby Implementation) then there are a few objects like nil, true, false... with fixed object_ids, also FixedNum instances have an object_id which can be computed from their value. In general though the object_id is typically related to the address of the object in memory, so you can't rely on any fixed mapping based on value, in fact, the object_id which is the identity of the object has to be independent of the state for a mutable object. -- Rick DeNatale Blog: http://talklikeaduck.denhaven2.com/ Twitter: http://twitter.com/RickDeNatale WWR: http://www.workingwithrails.com/person/9021-rick-denatale LinkedIn: http://www.linkedin.com/in/rickdenatale --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
