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Parse Error On Input Where


You signed out in another tab or window. At each recursive step, a list of type [(a, a)] (a list of pairs) is mapped against the parameter (a, b):moves of hanoi_shower. I think only an average Haskell programmer understands the original pointfree program as quickly as this comment. I'm not so sure - the names just try to put meaningful labels on the internals of 'oddSquareSum', while the comment refers to the whole function, and it can be picked have a peek here

Haskell layout rules specify that tab stops are 8 columns apart and that the tab character moves to the next tab stop. Sebastian -- Underestimating the novelty of the future is a time-honored tradition. (D.G.) _______________________________________________ Haskell-Cafe mailing list [hidden email] http://www.haskell.org/mailman/listinfo/haskell-cafe Daniel Fischer-4 Reply | Threaded Open this post in threaded view permalinkembedsaveparentgive gold[–][deleted] 0 points1 point2 points 2 years ago(1 child)(LYAH should drop these pseudoscientific examples, or clearly mark them as such.) permalinkembedsave[–]MrPopinjay 0 points1 point2 points 2 years ago(0 children)What do you mean? Anyway, have fun!

Haskell Parse Error Possibly Incorrect Indentation

Not the answer you're looking for? The solution above uses list comprehension: The generator (a, b) <- moves feeds each pair in turn to the left-hand expression (a, b), and this pair is mapped to the left style but I, like this, did not get it to work. My previous version is way how to write it in non lazy functional or logical languages in tail call fashion (e.g.

Russell.) 2 See also What a Monad is not Retrieved from "https://wiki.haskell.org/index.php?title=Common_Misunderstandings&oldid=60549" Category: FAQ Navigation Haskell Wiki community Recent changes Random page Tools What links here Related changes Special pages Printable Sorry this isn't the full picture - for an inverse point of view see do notation considered harmful. 1.5 Iterating Over a List Some beginners confuse a single-element list pattern (such Be Sociable, Share! Haskell Parse Error On Input Function permalinkembedsaveparentgive gold[–]chrisdoner 2 points3 points4 points 2 years ago(0 children)A stranger offered me a tab once, I just said “no.” permalinkembedsaveparentgive gold[–][deleted] 1 point2 points3 points 1 year ago(0 children)Just came here to say thank

oddSquareSum :: Integer oddSquareSum = sum (takeWhile (<10000) (filter odd (map (^2) [1..]))) Being such a fan of function composition, I would have probably written that like It's arguably allowed to have tab stops at 4,12,20,etc. In the example my prof gave us, he wants the states to be Chars and the path labels to be either 0 or 1. http://stackoverflow.com/questions/32202605/parse-error-on-input-where Top Berengal Superabacus Mystic of the First Rank Posts: 2707 Joined: Thu May 24, 2007 5:51 am UTC Location: Bergen, Norway Contact: Contact Berengal WLM Re: Haskell - "Parse error on

Doaitse Swierstra-2 "S. Parse Error On Input Arrow Ubuntu Logo, Ubuntu and Canonical Canonical Ltd. Didn't know that could make a difference. Here are some mistakes that have been observed from multiple sources. 1.1 Indentation Perhaps the first trip-up - you might understand that indentation defines where a code block starts and the

Parse Error On Input =' Ghci

permalinkembedsaveparentgive gold[–]faustianredditor 1 point2 points3 points 2 years ago(4 children)I usually use tabstops. permalinkembedsaveparentgive gold[–]eigenduck 1 point2 points3 points 2 years ago(0 children)The layout rules mean that it matters how far a line is indented. Haskell Parse Error Possibly Incorrect Indentation Top stone915 Posts: 42 Joined: Wed Jan 07, 2009 4:31 am UTC Re: Haskell - "Parse error on input" Quote Postby stone915 » Mon Jan 26, 2009 7:04 am UTC Awesome, Parse Error In Pattern Haskell There was also a argument missing for the call to rev (an empty list): palindrome :: [a] -> [a] palindrome xs = con xs rs where con a b = rev

isSpace)) which IMO is a lot easier to read, taking up less screen and mind estate. navigate here I think I'm going to leave the v and e data types generalized though, because that was part of the original template and I think my prof wants it to be You still can put it outside the lambda and it will still have tho same effects. then printf "Golds %s, Silvers %s" (show (gold s g)) (show (silver s g)) It can be a little hard to understand the type at first, but IMHO it works as Haskell Parse Error On Input Let

It does cut both ways, I suppose :-) > With the names in the rewritten example this comment is no longer > necessary. Found an article about the different types of folds if anyone else is interested.http://haskell.org/haskellwiki/Foldr_Foldl_Foldl' Top stone915 Posts: 42 Joined: Wed Jan 07, 2009 4:31 am UTC Re: Haskell - "Parse error To avoid any confusion I'm not using tabs at all anymore. Check This Out Top Display posts from previous: All posts1 day7 days2 weeks1 month3 months6 months1 year Sort by AuthorPost timeSubject AscendingDescending Post Reply Print view 16 posts • Page 1 of 1 Return

Found this thread after googling, and this made my code work, plus it looks neater! Haskell Parse Error On Input Module ghci Also, I think that the tutorials should have a bias / consistent structure of learning from a REPL / interactive session, and should be normalized with instructions at the top Introducing names means that I need to keep the temporary definitions in my head, and I think "takeWhile (<10000)" is as clear as it can get.

I think that's the right version.

But appreciate your quick answer on half of that. asked 7 years ago viewed 7218 times active 4 years ago Related 494Haskell: difference between . (dot) and $ (dollar sign)172What does the exclamation mark mean in a Haskell declaration?761Getting started And especially in this case, naming otherwise clear code fragments just introduces a layer of indirection, which add more opportunities for errors and misunderstandings. > That example above has six names Haskell Parse Error On Input If Last edited by cgroza; November 15th, 2011 at 10:40 PM.

Here is the result of executing the above code in WinHugs: Main> putStr (hanoi_shower (hanoi 'a' 'b' 'c' 2)) Move 'a' to 'b'. permalinkembedsaveparentgive gold[–]bss03 1 point2 points3 points 2 years ago(0 children)It's all about the layout rules that let you elide brace and semi-colon characters by indenting your code in certain ways. Top stone915 Posts: 42 Joined: Wed Jan 07, 2009 4:31 am UTC Re: Haskell - "Parse error on input" Quote Postby stone915 » Tue Jan 27, 2009 3:01 am UTC Laguana this contact form On 09/03/10 19:04, boblettoj wrote: > Hi, i am getting an error when trying to compile this part of my program, its > my first time using haskell and as lovely

I was given a template with type declarations and function type signatures and was told to implement the functions. What's the difference in sound between the letter η and the diphthong ει? "Have permission" vs "have a permission" Thesis reviewer requests update to literature review to incorporate last four years What kind of weapons could squirrels use? There are other ways of iterating over lists as well.

isSpace)) I agree, and also tend to this style. Here's what the solution looks like when put into a function. Not quite; data Bool = True | False, and the code uses a lowercase 'f' 'false'. asked 1 year ago viewed 335 times active 1 year ago Related 15Scala equivalent to Haskell's where-clauses?88Haskell error parse error on input `='13type declarations in 'where' — what's going on?1Haskell -

In reply to this post by boblettoj On 9 mrt 2010, at 20:04, boblettoj wrote: > > Hi, i am getting an error when trying to compile this part of my x x) has a type, then is the type system inconsistent? Perhaps 'false' is defined as a String somewhere else?  A bit odd, perhaps, but not necessarily a type error. -Brent _______________________________________________ Haskell-Cafe mailing list [hidden email] http://www.haskell.org/mailman/listinfo/haskell-cafe _______________________________________________ Haskell-Cafe mailing list I much prefer: >> >> then "Golds "++show (gold s g)++... >> >> For some reason, this is a style isse that doesn't get much attention >