On Thu, 14 Mar 2024 16:06:50 -0400
Duncan Murdoch wrote:
> Error in xj[i] : invalid subscript type 'list'
> Calls: join_inner -> data.frame -> [ -> [.data.table -> [.data.frame
> Execution halted
And here's how it happens:
join_inner calls xi[yi,on=by,nomatch=0] on data.tables xi and yi.
There was fairly recently a discussion on this list of a problem whose
solution involved having code in NAMESPACE which exported everything
whose name did not start with ".".
In the course of this discussion it was remarked that the code given in
"Writing R Extensions", explicitly
On Sat, 16 Mar 2024 11:39:28 +1100
Hugh Parsonage wrote:
> It would have been helpful for that person to specify their candidate
> regex, rather than just saying it could be simpler.
Actually they *did* specify; the problem was that my ageing senile
memory could not recall the specification.
It would have been helpful for that person to specify their candidate
regex, rather than just saying it could be simpler.
That out of the way, I believe
exportPattern("^[^.]")
would be sufficient since the square brackets remove any special
meaning the dot has. For an alternative, given the
