Best way to modify code without breaking stuff.

[Paul Rubin]

Jesse Aldridge <JesseAldridge at gmail.com> writes:
> I've got a module that I use regularly.  I want to make some extensive
> changes to this module but I want all of the programs that depend on
> the module to keep working while I'm making my changes.  What's the
> best way to accomplish this?

Do you mean you want to hot-patch a running program?  The short answer
is: don't.