Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/22227#discussion_r214566285 --- Diff: R/pkg/R/functions.R --- @@ -3410,13 +3410,15 @@ setMethod("collect_set", #' \dontrun{ #' head(select(df, split_string(df$Sex, "a"))) #' head(select(df, split_string(df$Class, "\\d"))) +#' head(select(df, split_string(df$Class, "\\d", 2))) --- End diff -- The current build failure: ``` Undocumented arguments in documentation object 'column_string_functions' 'limit' Functions with \usage entries need to have the appropriate \alias entries, and all their arguments documented. The \usage entries must correspond to syntactically valid R code. See the chapter 'Writing R documentation files' in the 'Writing R ```
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