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Parse Error On Input Putstrln'

Haskell - parse error on input “=” haskell my last line “putStr" threw error Haskell: parse error on input `|' Try a Google Search Try searching for similar questions Browse our Should I defragment my SSD? Thank you! @Mel : Actually, you can mix tabs and spaces in various combinations when indenting multiple lines; the important thing here is that the Haskell Report specifies that a tab Thank you! –Mel Jun 2 '13 at 5:55 2 @Mel : Actually, you can mix tabs and spaces in various combinations when indenting multiple lines; the important thing here is http://newmicros.net/parse-error/parse-error-on-input-where.html

I really did not notice this when I write it. asked 1 year ago viewed 364 times active 1 year ago Blog How Do Software Developers in New York, San Francisco, London and Bangalore… Visit Chat Related 0Parse error in Haskell11Haskell: randomInt` –scholar guy Jul 17 at 12:53 | show 1 more comment 2 Answers 2 active oldest votes up vote 8 down vote You have mixed tabs and spaces. A paper I received to review has (independently) duplicated work that we are writing up.

Can a rejected manuscript be submitted to another Elsevier journal? Now let us turn to ghc’s output. Not the answer you're looking for? They're mildly okay in languages that don't use indentation for meaning, but they are just going to make your life difficult in languages like Haskell or Python.

Your answer is really helpful. E.g., put let on one line and x = 1 on the next. ghci> let (x:xs) = [1,2,3,4] ghci> x 1 ghci> xs [2,3,4] The way that you are using (x:xs) in your code hints that you do not yet have a firm grasp With GHC 7.0's {-# LANGUAGE RebindableSyntax #-} extension, you can even get away with class IfThenElse a b c d | a b c -> d where ifThenElse :: a ->

Browse other questions tagged haskell or ask your own question. Can my brother from Australia buy a flydubai airline ticket for me? Could anyone help me please? If you're using a text editor that can display literal tabs in a special way, set it up to do so; it will save you some headaches.

Not the answer you're looking for? I think it is a little bit tricky. :D –Mel Jun 2 '13 at 5:46 As an aside: That doesn't look like a full error message. How to deal with it? Using shrinkage when estimating covariance matrix before doing PCA Why are there separate seasons for Archery and Firearm hunting for deer?

about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Science Other Stack Overflow Server Fault See haskell.org/onlinereport/haskell2010/… –ephemient Dec 1 '10 at 2:59 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Therefore, if the type checker can’t find an instance for a function, the more likely scenario is that the programmer simply did not pass enough parameters to the function. palin :: IO () palin = do line <- getLine putStr line --Probably better to use putStrLn?

Mike’s Epilogue I’ve created a patch for ghc that clarifies the specific error messages that Paul had trouble with (and a few related ones). http://newmicros.net/parse-error/parse-error-on-input-39-ghci.html Both languages tell me that there are too many arguments. Check this Out Similar queries Grouping the input and button: You can either read the input from start.sh: J, 17 characters (with input as a list) Output (for the input from more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed

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haskell share|improve this question edited Jun 2 '13 at 5:36 dda 4,80511229 asked Jun 2 '13 at 5:34 Mel 3817 4 Check your whitespace to make sure there are no How do they travel so fast in Futurama? Cool. weblink Haskell error parse error on input `=' Haskell, parse error on input `)' Haskell - parse error on input `|' Haskell parse error on input `|' Haskell parse error on input

In the C++ version, I forgot the parentheses, and in the Haskell version I forgot the else. computeKnapsack (sort fracList) computeKnapsack $ sort fracList computeKnapsack sort(fracList) computeKnapsack sort (fracList) computeKnapsack sort fracList sort fracList Haskell, parse error in input 'if' - Stack Overflow View More at http://stackoverflow.com/questions/11814525/haskell-parse-error-i... Can there be harmony amongst us?

In particular: Anytime there is a parse error caused by a malformed if, case, lambda, or (non-monadic) let, ghc will now remind the programmer of the correct syntax.

About 186 results There are a few things wrong with this code. Connect to Services Connect to personal services for more relevant search results across services. How can I write code if a few simple mistakes cripple my progress? I was going to add the other one randInt a = randomRIO (1,a) but I tripped over the dreaded monomorphism restriction when I defined getInt = readLn. –Cirdec Apr 8 '15

You need to introduce a do block after the else like so: else do let myTrades = process myData conn <- connectSqlite3 "trades.db" insert <- DB.prepare conn "INSERT INTO trades VALUES Lined up circle, n points Why do people call him Red? My idea is based on the fact that it is fairly rare for functions to be instances of type classes. check over here how can that be done using sequence? –Rog Matthews Jan 16 '12 at 6:20 2 I think you're best off asking something unrelated like that as a separate question. –Tikhon

Haskell’s compiler ghc simply lags behind g++ in terms of useful error messages for beginners. Your answer is really helpful. Thanks. "parse error on input" in Haskell if-then-else conditional - Stack Ove... All of the statements in a do block must start with the exact same whitespace, and not just appear to line up visually.

How to proceed in light of peer-review confidentiality? main = do putStrLn "Hello, what's your name?" name <- getLine putStrLn ("Hey" ++ name ++ ", nice to meet you!") The error message is: parse error on input 'putStrLn' It How to jump to middle of buffer How do they travel so fast in Futurama? Commuting daily with an Expensive Bike, tips?

The Detect Thoughts spell is trivializing social encounters. The error is simply too technical to help me. Why are some people so paranoid about music theory? contact | privacy policy | terms of use © 2014-15 recalll × Modal header Body...

How to know if two ETFs are 'substantially identical' according to wash sale rules? Replacing the let clause with a where clause. Would Donald Trump have won the national popular vote if it wasn't for California? Not the answer you're looking for?

Why are there separate seasons for Archery and Firearm hunting for deer? asked 3 years ago viewed 1226 times active 3 years ago Blog How Do Software Developers in New York, San Francisco, London and Bangalore… Linked 1 Parse error in pattern: putStrLn haskell parse-error share|improve this question asked Dec 1 '10 at 2:14 sentinel 91314 add a comment| 2 Answers 2 active oldest votes up vote 5 down vote accepted Just to demonstrate I admit I’m still a novice programmer: My only experience is a year of classes in C++ programming.

I knew tabs were horrible but still used just because it never gave me an issue before. Also the parse error on the if statement is because there shouldn't actually be an if statement where you are trying to put one, you have already completed the definition of Both error messages let the programmer know where the mistake happened, but the g++ message is far more helpful.