Discussion on: Daily Challenge #158 - RGB To Hex Conversion

[Amin]

Elm

toHexadecimalLetter : Int -> String
toHexadecimalLetter integer =
    case integer of
        10 ->
            "A"

        11 ->
            "B"

        12 ->
            "C"

        13 ->
            "D"

        14 ->
            "E"

        15 ->
            "F"

        _ ->
            String.fromInt integer

toHexadecimal : Int -> String
toHexadecimal integer =
    let
        clampedInteger  = clamp 0 255 integer
        integerDivision = clampedInteger // 16
        decimalDivision = toFloat clampedInteger / 16.0
        rest            = floor ((decimalDivision - toFloat integerDivision) * 16)
    in
        toHexadecimalLetter integerDivision ++ toHexadecimalLetter rest 

rgb : Int -> Int -> Int -> String
rgb red green blue =
    [red, green, blue]
        |> List.map toHexadecimal
        |> String.join ""

Test.