dragosmg commented on code in PR #13196:
URL: https://github.com/apache/arrow/pull/13196#discussion_r878259012
##########
r/R/dplyr-datetime-helpers.R:
##########
@@ -201,19 +213,130 @@ build_formats <- function(orders) {
}
build_format_from_order <- function(order) {
- year_chars <- c("%y", "%Y")
- month_chars <- c("%m", "%B", "%b")
- day_chars <- "%d"
-
- outcome <- switch(
- order,
- "ymd" = expand.grid(year_chars, month_chars, day_chars),
- "ydm" = expand.grid(year_chars, day_chars, month_chars),
- "mdy" = expand.grid(month_chars, day_chars, year_chars),
- "myd" = expand.grid(month_chars, year_chars, day_chars),
- "dmy" = expand.grid(day_chars, month_chars, year_chars),
- "dym" = expand.grid(day_chars, year_chars, month_chars)
+ char_list <- list(
+ "y" = c("%y", "%Y"),
+ "m" = c("%m", "%B", "%b"),
+ "d" = "%d",
+ "H" = "%H",
+ "M" = "%M",
+ "S" = "%S"
+ )
+
+ split_order <- strsplit(order, split = "")[[1]]
+
+ outcome <- expand.grid(char_list[split_order])
+ formats_with_sep <- do.call(paste, c(outcome, sep = "-"))
+ formats_without_sep <- do.call(paste, c(outcome, sep = ""))
+ c(formats_with_sep, formats_without_sep)
Review Comment:
What if the data has a mixture of both? I imagine it could happen in very
messy datasets. So probably more like:
```r
ifelse(grepl("-", col), try_both_formats, try_only_without_sep)
```
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
