Created
July 27, 2017 13:18
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Première tentative de programmation fonctionnelle : decomposition en facteurs premiers
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import Html exposing (Html, button, div, text) | |
import Html.Events exposing (onClick) | |
main = | |
Html.beginnerProgram { model = model, view = view, update = update } | |
type alias Model = | |
{ nbr : Int | |
, dec : List Int | |
} | |
model : Model | |
model = Model 0 [] | |
type Msg = Increment | Decrement | Decompose | |
update : Msg -> Model -> Model | |
update msg model = | |
case msg of | |
Increment -> | |
{ model | nbr = model.nbr + 1 } | |
Decrement -> | |
{ model | nbr = model.nbr - 1 } | |
Decompose -> | |
{ model | dec = decompose model.nbr 2 []} | |
decompose : Int -> Int -> List Int -> List Int | |
decompose nbr factor list = | |
if (nbr > 0 && sqrt(toFloat nbr) >= toFloat factor) then | |
if ((nbr % factor) == 0) then | |
decompose (nbr//factor) factor (factor :: list) | |
else | |
decompose nbr (factor + 1) list | |
else | |
nbr :: list | |
view : Model -> Html Msg | |
view model = | |
div [] | |
[ button [ onClick Decrement ] [ text "-" ] | |
, button [ onClick Increment ] [ text "+" ] | |
, button [ onClick Decompose ] [ text "Dec" ] | |
, div [] [ text (toString model.nbr) ] | |
, div [] [ text ("Decomposition : " ++ toString model.dec) ] | |
] |
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This is 💩
EDIT: Just kidding