Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/15608#discussion_r84815775
--- Diff: R/pkg/R/utils.R ---
@@ -339,20 +339,40 @@ varargsToEnv <- function(...) {
varargsToStrEnv <- function(...) {
pairs <- list(...)
env <- new.env()
- for (name in names(pairs)) {
- value <- pairs[[name]]
- if (!(is.logical(value) || is.numeric(value) || is.character(value) ||
is.null(value))) {
- stop(paste0("Unsupported type for ", name, " : ", class(value),
- ". Supported types are logical, numeric, character and NULL."))
- }
- if (is.logical(value)) {
- env[[name]] <- tolower(as.character(value))
- } else if (is.null(value)) {
- env[[name]] <- value
- } else {
- env[[name]] <- as.character(value)
+ nameList <- names(pairs)
+ ignoredNames <- list()
+ i <- 1
--- End diff --
Oh, sure. Actually, it took me a while to find out a clean way but it ended
up with introducing another variable here...
```r
value <- pairs[[name]]
```
is failed when `name` is empty string (when they are non-named arguments),
producing the error as below:
```r
Error in env[[name]] <- value :
zero-length variable name
```
I wanted to access to that problematic values to print in
```r
ignoredNames <- append(ignoredNames, pairs[i])
...
warning(paste0("Non-named arguments ignored: ", paste(ignoredNames,
collapse = ", "), "."),
call. = FALSE)
```
To cut it short, I introduced that variable to access to the value when
`name` is empty. Maybe there should be another cleaver way but I couldn't come
up with it.
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