Best practice on naming inputs for functions

[martin.R]

There is a discussion around "to dot or not to dot" here:

Function argument naming conventions (`.x` vs `x`)

In a lot of tidyverse packages, function arguments are prefixed with a ., for instance purrr: purrr::map #> function (.x, .f, ...) #> { #> .f <- as_mapper(.f, ...) #> .Call(map_impl, environment(), ".x", ".f", "list") #> } #> <environment: namespace:purrr> As I understand it, this is to minimise ambiguity/clashes with other variable names in the current R session. Is this the preferred style for naming function arguments? Are there times when this isn't the preferred style? I've had a look at the tidyverse style guide, but it doesn't cover this explicitly (should I raise an issue about this?). EDIT: Raised as an issue here: https://github.com/tidyverse/style/issues/75 Issue clo…