Mercurial > urweb
view demo/tcSum.ur @ 828:14a6c0971d89
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author | Adam Chlipala <adamc@hcoop.net> |
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date | Sat, 30 May 2009 09:59:10 -0400 |
parents | 669ac5e9a69e |
children | 8d3aa6c7cee0 |
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fun sum [t] (_ : num t) [fs ::: {Unit}] (fl : folder fs) (x : $(mapU t fs)) = foldUR [t] [fn _ => t] (fn [nm :: Name] [rest :: {Unit}] [[nm] ~ rest] n acc => n + acc) zero [fs] fl x fun main () = return <xml><body> {[sum {A = 0, B = 1}]}<br/> {[sum {C = 2.1, D = 3.2, E = 4.3}]} </body></xml>