1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
{- Tested with:
elm make src/Main.elm
# and access elm/index.html in a web browser(firefox in my case)
# which shows Task1 and Task2 altogether: couldn't find the better way
-}
module Main exposing (..)
import Browser
import Html exposing (..)
import Html.Attributes exposing (..)
import Html.Events exposing (onInput)
import String
import List exposing (map, head, tail)
import Ch1
import Ch2
-- MAIN
main =
Browser.sandbox { init = init, update = update, view = view }
-- MODEL
type alias Model =
{ numberListString : String
, numberList : List Int
, majorNumber : Maybe Int
, charListString : String
, fnrString : Maybe String
}
init : Model
init =
Model "" [] Nothing "" Nothing
-- UPDATE
type Msg
= FindMajor String
| GetFNR String
update : Msg -> Model -> Model
update msg model =
case msg of
FindMajor newListString ->
let result = Ch1.pairNumberListAndMajor newListString
in { model
| numberListString = newListString,
numberList = Tuple.first result,
majorNumber = Tuple.second result }
GetFNR newString ->
{ model
| charListString = newString,
fnrString = if String.length newString == 0 then Nothing
else Ch2.getFNR newString }
-- VIEW
view : Model -> Html Msg
view model =
div [ style "width" "90%" ]
[ h1 [] [ text "Task1: Majority Element" ]
, viewInput "text" "Type List of numbers, separated by space"
model.numberListString FindMajor
, displaySizeOfList model
, displayMajor model
, h1 [] [ text "Task2: FNR" ]
, viewInput "text" "Type a string consists of characters"
model.charListString GetFNR
, displayFNR model
]
viewInput : String -> String -> String -> (String -> msg) -> Html msg
viewInput t p v toMsg =
div [ style "background-color" "gray" ]
[ input [ size 150, type_ t, placeholder p, value v, onInput toMsg ] [] ]
displaySizeOfList : Model -> Html msg
displaySizeOfList model =
case (List.length model.numberList) of
0 -> div [] [ text "Size: 0" ]
x -> div [] [ text ( "Size: " ++ (String.fromInt x) ) ]
displayMajor : Model -> Html msg
displayMajor model =
case model.majorNumber of
Nothing ->
if List.length model.numberList == 0 then
div [ style "color" "blue" ] [ text "List is empty" ]
else
div [ style "color" "red" ] [ text "Major Not Found: -1" ]
Just x ->
div [ style "color" "green" ] [ text ( "Major Number: " ++
String.fromInt(x) ) ]
displayFNR model =
case model.fnrString of
Nothing ->
div [ style "color" "red" ] [ text "No String given" ]
Just s ->
div [ style "color" "green" ] [ text s ]
|
