rok commented on code in PR #13506:
URL: https://github.com/apache/arrow/pull/13506#discussion_r930133620
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r/R/dplyr-datetime-helpers.R:
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@@ -166,6 +166,18 @@ build_formats <- function(orders) {
orders <- gsub("[^A-Za-z]", "", orders)
orders <- gsub("Y", "y", orders)
+ invalid_orders <- nchar(gsub("[ymdqIHMS]", "", orders)) > 0
Review Comment:
I've made this into a different check. Basically the format needs to be
longer than 6 chars to be considered valid (e.g.: "ymd" -> "%Y%m%d" is 6 chars
long and is probably the shortest format we have).
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