Function called to validate path correctness
on_validate_path(fun)
| fun | a function; if missing, returns value of the path.chain.on.path.not.exists option |
|---|
# We'll create an options backup for this example old.options <- options() is_path_valid <- function(x) grepl("\\.fst", x) on_validate_path(is_path_valid) on_validate_path()#> function(x) grepl("\\.fst", x) #> <environment: 0x562069d27fd0>options(old.options)