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view demo/sum.ur @ 902:4b9f1de2c647

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dlist add and delete both working in Iceape and Konqueror
author Adam Chlipala <adamc@hcoop.net>
date Thu, 06 Aug 2009 14:39:03 -0400
parents 669ac5e9a69e
children 8d3aa6c7cee0
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line source
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 [fs] fl x

fun main () = return <xml><body>
  {[sum {}]}<br/>
  {[sum {A = 0, B = 1}]}<br/>
  {[sum {C = 2, D = 3, E = 4}]}
</body></xml>