4 ms·
That's just to say that there aren't multiple "2"s. But 2 itself is still an object, pointing at its Fixnum class, which has all the normal Class and Object sem
by wycats 17y ago
That's just to say that there aren't multiple "2"s. But 2 itself is still an object, pointing at its Fixnum class, which has all the normal Class and Object semantics.
- tptacek 17y agoFixnums have a different representation in the interpreter (at least in 1.8 MRI) than normal objects do, which is probably what tripped me up here.
- wycats 17y agoYeah. Conceptually, you can think of the difference as whether or not there can be two copies of something. There can only be one copy of a Symbol, Fixnum, true, false, and nil. This means that true == true, and true.dup #=> error.