[Haskell-beginners] How can I fix this 'where' error ?

[S. H. Aegis]

It's work !
Thank you so much !
I change my editor settings as you said.
Thank you again, and Have a nice day.

S. Chang


2014-04-06 9:18 GMT+09:00 Bob Ippolito <bob at redivi.com>:

> The problem is that you are mixing tabs and spaces. It doesn't realize
> that the two lines are supposed to be at the same level of indentation.
> It's best to always use spaces, never tabs.
>
> This might be easier to avoid if you put where on its own line, but the
> best solution is to configure your text editor to always expand tabs to
> spaces.
>
>
> On Sat, Apr 5, 2014 at 5:13 PM, S. H. Aegis <shaegis at gmail.com> wrote:
>
>> Hi.
>> I'm new to Haskell. I try to solve Euler Project for studying Haskell
>> through Googling, reading books.
>> There is a error in where sentence, but I can't fix this.
>>
>> maxEleList :: String -> String -> [Int]
>> maxEleList xs ys = maxOfTwo upperList lowerList
>> where upperList = map turpleSum $ zip (toIntList xs) (toIntList ys)
>>  lowerList = map turpleSum $ zip (toIntList xs) (tail $ toIntList ys)
>>
>> Error message is
>> ~/maxPathSum.hs: line 4, column 75:
>>   Parse error
>>   Error message:
>>     Parse error: =
>>   Code:
>>       maxEleList xs ys = maxOfTwo upperList lowerList
>>       where upperList = map turpleSum $ zip (toIntList xs) (toIntList ys)
>>     > lowerList = map turpleSum $ zip (toIntList xs) (tail $ toIntList
>> ys)
>>
>>
>> How can I fix this?
>> Thank you for your kind help.
>>
>> S. Chang
>>
>>
>> ----------------
>> This code is for Euler project: problem 18, and whole code is like
>> this... (Not yet finished...)
>>
>> maxEleList :: String -> String -> [Int]
>> maxEleList xs ys = maxOfTwo upperList lowerList
>> where upperList = map turpleSum $ zip (toIntList xs) (toIntList ys)
>>  lowerList = map turpleSum $ zip (toIntList xs) (tail $ toIntList ys)
>> maxOfTwo :: [Int] -> [Int] -> [Int]
>> maxOfTwo [] [] = []
>> maxOfTwo (x:xs) (y:ys) = max x y : maxOfTwo xs ys
>>
>> turpleSum :: (Int, Int) -> Int
>> turpleSum (x, y) = x + y
>>
>> toIntList :: String -> [Int]
>> toIntList = map (\x -> read x :: Int) . words
>>
>> rowData :: [[Int]]
>> --rowData = reverse $ map (map (\x -> read x :: Int) . words) [r1, r2,
>> r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15]
>> rowData = map (map (\x -> read x :: Int) . words) [r1, r2, r3, r4, r5,
>> r6, r7, r8, r9, r10, r11, r12, r13, r14, r15]
>>
>> r1 = "75"
>> r2 = "95 64"
>> r3 = "17 47 82"
>> r4 = "18 35 87 10"
>> r5 = "20 04 82 47 65"
>> r6 = "19 01 23 75 03 34"
>> r7 = "88 02 77 73 07 63 67"
>> r8 = "99 65 04 28 06 16 70 92"
>> r9 = "41 41 26 56 83 40 80 70 33"
>> r10 = "41 48 72 33 47 32 37 16 94 29"
>> r11 = "53 71 44 65 25 43 91 52 97 51 14"
>> r12 = "70 11 33 28 77 73 17 78 39 68 17 57"
>> r13 = "91 71 52 38 17 14 91 43 58 50 27 29 48"
>> r14 = "63 66 04 68 89 53 67 30 73 16 69 87 40 31"
>> r15 = "04 62 98 27 23 09 70 98 73 93 38 53 60 04 23"
>>
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>>
>
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-- 
Sok Ha, CHANG
Dr. Chang's Clinic. #203. 503-23. AmSa-Dong, GangDong-Gu, Seoul.
Tel: +82-2-442-7585
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