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view demo/sum.ur @ 1916:e2345c438f08
Postgres: print SQLSTATE on DML failure, to help figure out when new special cases should be added
| author | Adam Chlipala <adam@chlipala.net> |
|---|---|
| date | Wed, 27 Nov 2013 15:42:24 -0500 |
| parents | 8d3aa6c7cee0 |
| children |
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fun sum [fs ::: {Unit}] (fl : folder fs) (x : $(mapU int fs)) = @foldUR [int] [fn _ => int] (fn [nm :: Name] [rest :: {Unit}] [[nm] ~ rest] n acc => n + acc) 0 fl x fun main () = return <xml><body> {[sum {}]}<br/> {[sum {A = 0, B = 1}]}<br/> {[sum {C = 2, D = 3, E = 4}]} </body></xml>