Home > Parse Error > Parse Error Possibly Incorrect Indentation

Parse Error Possibly Incorrect Indentation

Contents

Oldest first Newest first Threaded Comments only Change History (5) comment:1 Changed 9 years ago by tim I agree with Neil. Do these physical parameters seem plausible? compare `on` thing). How to explain the existence of just one religion? http://kiloubox.com/parse-error/parse-error-possibly-incorrect-indentation-haskell.html

How do I "Install" Linux? doubleEverYOther is being treated as though it's a different function. You could write offsets as offsets :: Fractional a => [a] -> [a] offsets nums = let m = mean nums in [ x - m | x <- nums ] The compiler certainly isn't forgiving though! :( –gideon Sep 25 '13 at 16:09 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using http://stackoverflow.com/questions/27181476/haskell-parse-error-possibly-incorrect-indentation-or-mismatched-brackets

Haskell If Then Else Indentation

How would I simplify this summation: Movie about a board-game that asks the players touchy questions Why would breathing pure oxygen be a bad idea? I have to double every second item from the right. Well, not really, there are a lot of pitfalls in other languages to the point that these pitfalls become "normal" (ie, string + number = convert number to string and concat permalinkembedsaveparentgive gold[–]Die-Nacht 0 points1 point2 points 2 years ago(2 children)You can't use / on an int.

permalinkembedsaveparentgive gold[–]rwobben[S] 0 points1 point2 points 1 year ago(5 children)Oke, I have now this : doubleEveryOther :: [Integer] -> [Integer] doubleEveryOther [] = [] doubleEveryOther lst | length lst `mod` 2 == 0 Why did they bring C3PO to Jabba's palace and other dangerous missions? The Y is capitalized in one of them. All rights reserved.REDDIT and the ALIEN Logo are registered trademarks of reddit inc.πRendered by PID 8971 on app-542 at 2016-10-23 23:50:53.882499+00:00 running e8b52b1 country code: SE.

There's also genericLength from Data.List, but we don't need to mess around with that, yet. I made sure to use space for indentation. haskell share|improve this question edited Nov 21 '11 at 19:28 joaquin 35.3k1486115 asked Oct 24 '11 at 1:59 user1010130 612 Is the whole thing actually indented 2 or 3 click resources haskell share|improve this question edited Nov 28 '14 at 6:39 Chris Martin 15.4k23049 asked Nov 28 '14 at 3:31 giang271291 316 add a comment| 2 Answers 2 active oldest votes up

current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. If you hold 2 in some value of type Int, then it would fail. share|improve this answer answered Mar 27 '14 at 3:32 Chuck 175k19230340 So it works! Problem to left align within a split DDoS ignorant newbie question: Why not block originating IP addresses?

Haskell Indentation Rules

I have no idea how hard it would be to improve this in the current parser, but from a user point of view, it can be enormously frustrating. https://www.reddit.com/r/haskell/comments/3bj3gq/parse_error_possibly_incorrect_indentation_or/ Veamos algunos casos comunes: Dejar espacios o tabs antes de la cabecera de la función La cabecera de la función debe arrancar justo "contra el margen". Haskell If Then Else Indentation Student discount for Frankfurt Radio Symphony Orchestra Should I use "teamo" or "skipo"? Parse Error On Input squared :: Num a => a -> a or, if we only want Ints squared :: Int -> Int Now for mean mean :: Fractional a => [a] -> a We

permalinkembedsaveparentgive gold[–]htebalaka 1 point2 points3 points 1 year ago*(6 children)You can use (x:y:xs) as the pattern I think you're asking for. this contact form Política de protección de datos Acerca de Uqbar-Project Aviso legal You have to be explicit about type conversions. Is it illegal to DDoS a phishing page? Haskell Guards

in ... Why would breathing pure oxygen be a bad idea? For instance, length always returns an Int, but there's no Fractional instance for Int, so you can't use (/) with it. http://kiloubox.com/parse-error/parse-error-possibly-incorrect-indentationfailed-modules-loaded-none.html Hopefully this gives you some insight as to how to write a haskell function.

Then we want offsets :: Fractional a => [a] -> [a] since we start with a list of numbers that we want to interact with via mean. Your comment is sort of unclear. –Jeff Burka Oct 24 '11 at 2:21 @JeffreyBurka I'm guessing type substitution from his comments and general problem. It has been a lifelong annoyance for me to not know whether that error message is *actually* due to incorrect indentation, or to mismatched brackets.

The guard needs to be a Bool.

It should be: multiples :: [Int] multiples = [x | x <- [1..1000], (x `mod` 5 == 0) || (x `mod` 3 == 0)] This isn't OCaml, so you don't need comment:3 Changed 9 years ago by NeilMitchell A simple fix would be that if the parsing fails with a "possibly incorrect indentation" style warning, you rerun the lexer over the original if (λ x . Because things like zip and fold are not mentioned I wrote this ; doubleEveryOther :: [integer] -> [Integer] doubleEveryOther lst | [] = [] | len lst `mod` 2 == 0

You can't do things like "string" + 2, like in other languages, and you can't do 2.0 / 2. permalinkembedsaveparent[–]NihilistDandy 3 points4 points5 points 2 years ago(0 children)Get through the first couple of chapters of Learn You A Haskell and you should be golden. Is there a good way to fix that? http://kiloubox.com/parse-error/parse-error-parse-error-unexpected-t-string-expecting-t-old-function.html To get around this, use undefined as a placeholder instead.

Visit the Trac open source project athttp://trac.edgewall.org/ [Haskell-beginners] Re: let indenting problems Daniel Fischer daniel.is.fischer at web.de Mon Mar 2 15:07:27 EST 2009 Previous message: [Haskell-beginners] Re: let indenting problems Next permalinkembedsaveparentgive goldaboutblogaboutsource codeadvertisejobshelpsite rulesFAQwikireddiquettetransparencycontact usapps & toolsReddit for iPhoneReddit for Androidmobile websitebuttons<3reddit goldredditgiftsUse of this site constitutes acceptance of our User Agreement and Privacy Policy (updated). © 2016 reddit inc.