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 5:24 am UTC Berengal 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 The graph will contain a list of ordered pairs made up of a vertex and a list of vertices connected to that vertex (an adjacency list). ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: http://0.0.0.10/ Connection to 0.0.0.10 failed. http://back2cloud.com/parse-error/parse-error-when-checking-module-version.php
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 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 5:40 am UTC Here's 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 Also, you don't import the module you're currently in: module sayhello ( inChinese , inSpanish ) where inChinese = "Ni Hao" inSpanish = "Hola" main = do print inChinese print inSpanish
However, I do appreciate the recommendations. Top Qoppa Posts: 694 Joined: Sat Nov 24, 2007 9:32 pm UTC Location: Yes. The problematic code segment was the following: hanoi_shower :: Show a => [(a, a)] -> String hanoi_shower [(a, b)] = "Move " ++ show a ++ " to " ++ show
In a Haskell file, you're only allowed to write bindings using =. y: z; The above is valid C code, a ternary operation, that's used quite commonly as a shortcut to typing out a full if-then-else block. There's also a standard function for what you are trying to do.Made some changes:Code: Select all-- A module for creating and handling directed graphs
module Digraph where --my 2 cents: How can I copy and paste text lines across different files in a bash script?
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 Haskell Generating Pythagorean triples below an upper bound Cannot use hat in self-made command Human vs apes: What advantages do humans have over apes? What you could do is put the following in the Haskell file: myHandle = do h <- IO.openFile "testtext" IO.ReadMode return h Though if you think about that for a bit, http://stackoverflow.com/questions/4482409/how-to-fix-parse-error-on-input-in-haskell Thanks a lot!
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 navigate here There are other ways of iterating over lists as well. However, ghc-7.8.3 fails: tests/TestMain.hs:26:1: parse error on input ‘module’ I am reporting this here in the hope there is a trivial solution. When did the coloured shoulder pauldrons on stormtroopers first appear?
I'm working on the second part of the assignment. Already have an account? Should I tell potential employers I'm job searching because I'm engaged? Check This Out Recent content is available under a simple permissive license.
Select Only Printed Out Cells Longest "De Bruijn phrase" in English What game is this picture showing a character wearing a red bird costume from? The problem is how to iterate over the elements (pairs) of the list while separating the first a of each pair from the second a. Thanks guys.Code: Select all-- CS 8 Problem Set 2
-- Author: Matt Stone
-- A module for creating and handling directed graphs
module Digraph (AdjList, Digraph, Edge,
Sign in to comment Contact GitHub API Training Shop Blog About © 2016 GitHub, Inc. While it's probably > possible to compile this code by making sure that the extension isn't > active (for instance, using ghc instead of ghci), it is probably a > better Okay, i'll go read up first. –Karthick Dec 19 '10 at 11:18 add a comment| 2 Answers 2 active oldest votes up vote 8 down vote accepted You can only use this contact form In the first case each step of the computation is evaluating something to the effect of False || 'rest' where 'rest' is a tail recursive call to foldl'.