paleolimbot commented on code in PR #13160:
URL: https://github.com/apache/arrow/pull/13160#discussion_r914895465


##########
r/R/arrow-datum.R:
##########
@@ -103,10 +103,10 @@ Ops.ArrowDatum <- function(e1, e2) {
 #' @export
 Math.ArrowDatum <- function(x, ..., base = exp(1), digits = 0) {
   switch(.Generic,
-    abs = ,
-    sign = ,
-    floor = ,
-    ceiling = ,
+    abs = eval_array_expression("abs_checked", x),
+    sign = eval_array_expression("sign", x),
+    floor = eval_array_expression("floor", x),
+    ceiling = eval_array_expression("ceil", x),

Review Comment:
   Is it necessary to update `.unary_function_map`? If not, I think it may be 
better to fix this in `eval_array_expression()` since it's not clear to me if 
the functions below will or will not work now.



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