MichaelChirico commented on a change in pull request #28386:
URL: https://github.com/apache/spark/pull/28386#discussion_r416372474
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File path: R/pkg/R/DataFrame.R
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@@ -2287,16 +2287,19 @@ setMethod("mutate",
# For named arguments, use the names for arguments as the column
names
# For unnamed arguments, use the argument symbols as the column
names
- args <- sapply(substitute(list(...))[-1], deparse)
Review comment:
R 4.0.0 adds `deparse1` that would have been more appropriate here:
> `deparse1()` is a simple utility added in R 4.0.0 to ensure a string
result (character vector of length one), typically used in name construction,
as `deparse1(substitute(.))`.
That function is just a wrapper so easy to backport:
```
deparse1 = function (expr, collapse = " ", width.cutoff = 500L, ...)
paste(deparse(expr, width.cutoff, ...), collapse = collapse)
```
(though personally I would still stick with `trimws`)
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