make.keys: creates/coerces objects to proper hash keys
Description
Given an vector of any type, make.keys tries to
coerce it into a character vector that can be used as a
hash key. This is used internally by the hash package and
should not be normally needed. It is not exported.
Usage
make.keys(key)
Arguments
Value
A character vector of valid keys/names
Details
This function is used internally by the hash
class to ensure that the keys are valid. There should be no
need to use this externally and is only documented for
completeness.