On Thu, May 5, 2011 at 7:43 AM, Ben Finney <ben+pyt...@benfinney.id.au> wrote: > * that the paper tag is tied to only one object > > * that a paper tag tied to no object is rather useless > > * that many paper tags can be tied to the same object
I disagree minorly; a tag tied to no object is quite useful in some circumstances. You can ditch the concept by having a special object that's called "No Object" (Python does this, with None), or you can allow your tag to point nowhere (C does this, with null pointers). The difference is semantic; either way, your tag can point to any object or it can point nowhere. (Pike goes for a slightly different approach; any variable, regardless of its stated types, may legally hold the integer 0. It acts somewhat as a null pointer, but it isn't really.) Chris Angelico -- http://mail.python.org/mailman/listinfo/python-list
