Fair enough. I'm going to derail/repurpose this thread to ask a couple of questions about attach().
I have often used with() for situations where I want to evaluate a bunch of expressions with the elements of a parameter vector, e.g. inside a gradient function for deSolve::ode(). However, I have found this very hard to debug because (AFAIK) you can't debug-step through the components of a with() expression. Potential solutions for this include 1. attach(params); on.exit(detach(params)) * this will be flagged by CRAN * I have found some really surprising (to me) precedence issues with this _when used in a package context_ - it looks like the elements in 'params' are found _after_ built-in objects in R?? (I have to take some time to make a MRE of this 2. The zeallot package does 'unpacking' as with Python tuples. I was worried about dragging in tidyverse dependencies, but it looks like it doesn't actually Import: anything. This doesn't quite do what I want, as I want to unpack using the names in the object (which makes it look perfect for the attach() solution) Thoughts? On 2020-04-06 10:49 a.m., Dirk Eddelbuettel wrote: > > On 6 April 2020 at 08:38, Ben Bolker wrote: > | Just reply to the CRAN maintainers and explain this situation. It¨s > | slightly buried, but the e-mail you received does say: > | > | > If you are fairly certain the rejection is a false positive, please > reply-all to this > | > message and explain. > > True, but this misses the "Letter of the law" versus the "Spirit of the law". > > It might be worth mentioning that use of attach() is seen, to find one poor > analogy, pretty much like use of global variables these days. "Just because > you could does not mean you should". > > See e.g. one of the first google hits for 'r do not use attach' here: > https://stackoverflow.com/questions/10067680/why-is-it-not-advisable-to-use-attach-in-r-and-what-should-i-use-instead > > Dirk > ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel