List Representation Discrepancy in M's Object Model

Wed, 24 Jun 2009 12:02:32 Z

Fibonacci[1,1,2]

and

Fibonacci { Head => 1, Tail => { Head => 1, Tail => { Head => 2, Tail => {} } } }

have different representations in the MGraph Object Model.

You can verify that by comparing the "List Example" and "Another List Example" graphs @ http://sixpairs.com/mgom.aspx

The first one has brands while the second one doesn't.

The second one looks more natural to me as the last tail is an empty collection without a brand (and the intermediate tails don't have brands either).

What do you think? Should the two representations be the same or do their differences add more semantic value?

List Representation Discrepancy in M's Object Model

Mon, 06 Jul 2009 19:41:48 Z

I agree that the second form should be what the first form yields. What it does instead looks like a bug.