On Mon, Feb 15, 2010 at 9:07 PM, Nick Alexander <ncalexan...@gmail.com> wrote: >>> To have an idea of the usage I went trough the code: >>> >>> - MatrixSpace.identity_matrix implement 1. >>> - MatrixSpace.zero_matrix implement 3. >>> >>> Of course, my opinion is to make those three methods implements 2. :-) >> >> +1 for doing option (2). > > > I very often want to start with the zero_matrix or the identity_matrix and > "fill in" the rest of the matrix. But I also want the access routines to be > fast! So I vote for copy-on-write semantics, if possible. > > Nick
Nick's suggestion is definitely a (4) -- it's nothing like any of (1)-(3) in this discussion. It could be done, but would be a *lot* of work (certainly way more than 1-3), and would likely slow down all writes somewhat. But it's possible. William -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
