"non-deletable" varibles like in packages but during runtime?
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I have a script, in which I want to "lock" certain variables, so that
they can not accidentally be deleted.
I was thinking about a mechanism similar to packages, so that I can
re-define the variable in a different namespace, but it is still
available in the original one, but only during runtime.
Is it possible, to do this? I think namespaces and environments are
the right approach for this, but I would need some pointers on how to
Second reaon why I would like to be able to do this: I am using org
mode, and I can pass variables from org-mode to R. But these are
"normal" variables, so that I can overwrite them and delete them, and
they are gone. I would like to have a mechanism so that the original
value would always be available.