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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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16
Task/Convert-seconds-to-compound-duration/Standard-ML/convert-seconds-to-compound-duration.ml Normal file
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local
fun fmtNonZero (0, _, list) = list
| fmtNonZero (n, s, list) = Int.toString n ^ " " ^ s :: list
fun divModHead (_, []) = []
| divModHead (d, head :: tail) = head div d :: head mod d :: tail
in
fun compoundDuration seconds =
let
val digits = foldl divModHead [seconds] [60, 60, 24, 7]
and units = ["wk", "d", "hr", "min", "sec"]
in
String.concatWith ", " (ListPair.foldr fmtNonZero [] (digits, units))
end
end
val () = app (fn s => print (compoundDuration s ^ "\n")) [7259, 86400, 6000000]