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module Utils exposing (..)
import Array as A exposing (..)
import Base exposing (Word, WordStatus(..))
import Time exposing (Posix, posixToMillis)
isNothing : Maybe a -> Bool
isNothing p =
case p of
Nothing ->
True
Just a ->
False
isJust : Maybe a -> Bool
isJust p =
not (isNothing p)
flip : (a -> b -> c) -> (b -> a -> c)
flip f =
\x y -> f y x
diffDuration : Posix -> Posix -> Float
diffDuration t1 t2 =
let
m1 =
posixToMillis t1
m2 =
posixToMillis t2
in
toFloat (m2 - m1) / 1000
wordCountWith : Array Word -> (WordStatus -> Bool) -> Int
wordCountWith words predicate =
words |> A.map .status |> A.filter predicate |> A.length
triple : a -> b -> c -> ( a, b, c )
triple a b c =
( a, b, c )
listIdx : List a -> Int -> Maybe a
listIdx ls idx =
List.head (List.drop idx ls)
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