Github user wangmiao1981 commented on a diff in the pull request:
https://github.com/apache/spark/pull/13476#discussion_r65742476
--- Diff: R/pkg/R/column.R ---
@@ -151,6 +151,40 @@ setMethod("substr", signature(x = "Column"),
column(jc)
})
+#' startsWith
+#'
+#' Determines if entries of x start with string (entries of) prefix
respectively,
+#' where strings are recycled to common lengths.
+#'
+#' @rdname startsWith
+#' @name startsWith
+#' @family colum_func
+#'
+#' @param vector of character string whose âstartsâ are considered
--- End diff --
I will add param name. The first line is for `x` and the second line is for
`prefix`
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