thisisnic commented on code in PR #14279:
URL: https://github.com/apache/arrow/pull/14279#discussion_r991885194
##########
r/R/dplyr-across.R:
##########
@@ -102,8 +102,20 @@ across_setup <- function(cols, fns, names, .caller_env,
mask, inline = FALSE) {
return(value)
}
+ is_single_func <- function(fns) {
+
+ # function calls with package base::round
+ (is.call(fns) && fns[[1]] == as.name("::")) ||
Review Comment:
I'm tempted to just allow R to catch it; if I try using something weird like
a dataset instead of a function, we'll get something like `Warning: Expression
ggplot2::diamonds(mpg) not supported in Arrow; pulling data into R`, and then
the same error we'd get if trying this in a non-Arrow context.
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