Maëlle's R blog

Time for me to throw away my sticky note after sharing what I wrote on it! grep(...) not which(grepl(...)) Recently I caught myself using which(grepl(...)), animals <- c("cat", "bird", "dog", "fish") which(grepl("i", animals)) #> [1] 2 4 when the simpler alternative is animals <- c("cat", "bird", "dog", "fish") grep("i", animals) #> [1] 2 4 And should I need the values instead of the indices, I know I shouldn’t write

When I see a book recommendation somewhere, be it for work or leisure, I often either order the book or set an alert in my favorite online second-hand bookstore. By the time I am notified the book is available, I sometimes don’t remember why I listed it! That’s what happened for the book A Philosophy of Software Design by John Ousterhout. I decided to trust my past self and buy it.

This post was featured on the R Weekly highlights podcast hosted by Eric Nantz and Mike Thomas. Following last week’s post on my testing workflow enhancements, Jenny Bryan kindly reminded me of the existence of an actual reset button when you’ve been interactively running tests that include some “local mess”: withr::local_envvar(), withr::local_dir(), usethis::local_project()… The reset button is withr::deferred_run(). It is documented in Jenny’s article about test fixtures: Since the global environment isn’t perishable, like a test environment is, you have to call deferred_run() explicitly to execute the deferred events.

I spend a lot of quality time with testthat, that sometimes deigns to praise my code with emojis, sometimes has to encourage me. No one gets it right on their first try apparently? Anyway, in honor of testthat 3.2.0 release 🎉 👏, I’d like to mention two small things that improved my testing workflow a whole lot! Running one single test at a time Under testthat 3.2.0 minor features lies a small gem:

This post was featured on the R Weekly highlights podcast hosted by Eric Nantz and Mike Thomas. In November I’ll give a talk about multilingualism in R at the Spanish R conference in Barcelona (😍). I can’t wait! Until then, I need to prepare my talk. 😅 I plan to present the rOpenSci “multilingual publishing” project but also other related tools, like potools. In this post, I’ll walk you through a minimal example of using potools to translate messages in an R package!