On Dec 2, 5:01 pm, rjf <fate...@gmail.com> wrote: > In the Maxima environment, if someone detects an error in a lisp > function, FF then the function > can be replaced in the run-time environment, e.g. at a command line > (%i100) by: > :lisp (defun FF(x y z) <newdefinition>) >
In the Python environment, if someone detects an error in a Python function FF, then the function can be replaced in the run-time environment, e.g. at a command line by: >>> def FF(x): ... return 2*x ... >>> print FF(2) 4 # FF is wrong, now correcting: >>> def FF_correct(x): ... return 3*x ... # and replacing >>> FF = FF_correct >>> FF(2) 6 > > If the replacement works, the replacement (or a command to load the > compiled version from a file) > can be place in an initialization file so that the next time Maxima is > loaded, the fix is automatically loaded. That also holds for Python, but we tend to modify the source code directly. Then the underlying version control system is used to extract a patch that represents the modifications. Those patches can be uploaded to our issue tracker for review, etc. > ... such fixes > took effect for all users. Maybe such a setup could be used for the > web-based access to Sage. That's in the planning stage for Sage. Collaborative environments for development would foster even more contributions to the Sage project! > (It's kind of interesting to realize that this idea -- of users > accessing a time-shared or networked-access > computer to use a math system -- was standard between say 1966 and > 1980, and continued on for some time..) > (In the years after 1980 some 50 VAX-Macsyma test sites were set up, > and later the program was sold etc.) Yes, it's "interesting". But personally, I tend to see this as a probably erroneous break in the overall trend. In the 70ties the social focus was still on a group, the 80ties focused on the individual. In music, art, personal computing and more the people were seen as individuals, not as part of groups. Often, there were commercial interests behind - more PCs sold, more operating systems, single artists pushed (pop idols), ... Internet and social applications bring people back together since 2000. That's an important trend for collaboratively developed software, especially free/open source software. > > I think that compiling all of Maxima typically takes between 10 > minutes and an hour We appreciate these rather short compilation times, since it is part of Sage's compilation process. H -- 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
