Github user zero323 commented on a diff in the pull request:
https://github.com/apache/spark/pull/17729#discussion_r112853256
--- Diff: R/pkg/R/functions.R ---
@@ -3745,3 +3745,55 @@ setMethod("collect_set",
jc <- callJStatic("org.apache.spark.sql.functions",
"collect_set", x@jc)
column(jc)
})
+
+#' split_string
+#'
+#' Splits string on regular expression.
+#'
+#' @param x Column to compute on
+#' @param pattern Java regular expression
+#'
+#' @rdname split_string
+#' @family string_funcs
+#' @aliases split_string,Column-method
+#' @export
+#' @examples \dontrun{
+#' df <- read.text("README.md")
+#'
+#' head(select(split_string(df$value, "\\s+")))
+#' }
+#' @note split_string 2.3.0
+#' @note equivalent to \code{split} SQL function
+setMethod("split_string",
+ signature(x = "Column", pattern = "character"),
+ function(x, pattern) {
+ jc <- callJStatic("org.apache.spark.sql.functions", "split",
x@jc, pattern)
+ column(jc)
+ })
+
+#' repeat_string
+#'
+#' Repeats string n times.
+#'
+#' @param x Column to compute on
+#' @param n Number of repetitions
+#'
+#' @rdname repeat_string
+#' @family string_funcs
+#' @aliases repeat_string,Column-method
+#' @export
+#' @examples \dontrun{
+#' df <- createDataFame(data.frame(
+#' text = c("foo", "bar")
+#' ))
--- End diff --
I thought about this but it is hard to find a good source at hand. We could
use `data/streaming/AFINN-111.txt` which has nice and short lines, or
`README.md` and just take `head(., 1)` (the rest is empty or longish.
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