Dear R-devel,
In a package of mine, I use removeSource on expression objects in order
to make expressions that are semantically the same serialize to the
same byte sequences:
https://github.com/cran/depcache/blob/854d68a/R/fixup.R#L8-L34
Today I learned that expressions containing function defini
On 30/03/2023 10:32 a.m., Ivan Krylov wrote:
Dear R-devel,
In a package of mine, I use removeSource on expression objects in order
to make expressions that are semantically the same serialize to the
same byte sequences:
https://github.com/cran/depcache/blob/854d68a/R/fixup.R#L8-L34
Today I lear
Hi Toby et al,
On Wed, Mar 29, 2023 at 10:24 PM Toby Hocking wrote:
> Dear R-devel,
> I did a systematic comparison of write.csv with similar functions, and
> observed two asymptotic inefficiencies that could be improved.
>
> 1. write.csv is quadratic time (N^2) in the number of columns N.
> C
If you can afford a dependency on rlang, `rlang::zap_srcref()` deals
with this. It's recursive over expression vectors, calls (including
calls to `function` and their hidden srcref arg), and function
objects. It's implemented in C for efficiency as we found it to be a
bottleneck in some application
