Github user felixcheung commented on a diff in the pull request: https://github.com/apache/spark/pull/19223#discussion_r138794052 --- Diff: R/pkg/R/functions.R --- @@ -1715,7 +1717,15 @@ setMethod("to_date", #' #' # Converts an array of structs into a JSON array #' df2 <- sql("SELECT array(named_struct('name', 'Bob'), named_struct('name', 'Alice')) as people") -#' df2 <- mutate(df2, people_json = to_json(df2$people))} +#' df2 <- mutate(df2, people_json = to_json(df2$people)) +#' +#' # Converts a map into a JSON object +#' df2 <- sql("SELECT map('name', 'Bob')) as people") +#' df2 <- mutate(df2, people_json = to_json(df2$people)) +#' +#' # Converts an array of maps into a JSON array +#' df2 <- sql("SELECT array(map('name', 'Bob'), map('name', 'Alice')) as people") +#' df2 <- mutate(df2, people_json = to_json(df2$people)) --- End diff -- ... meaning `}`
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