27 questions
The Yesod application configures the following:config/routes/HomeR GET POSTconfig/settings.yml host:_env:HOST:*4#any IPv4 hostport: _env:PORT:3000approot: _env:APPROOT:somedir/Accessing http://localho...
Recently, I've been studying Haskell for the first time and I'm just reading the library, but I have doubts about the use of the type operator.For example, in the following example, there is no right ...
DataHow do I access the first element of the type?As I asked you in , Haskell may only have a pattern match method to retrieve data.Example (from above link answer): dataShape=Rect Double DoublegetX(R...
I'd like to know how to test Japanese on Haskell's doctor testmodule Main where -- | Displayed in Japanese-- >> hoge-- Japanesehoge::Stringhoge=Japanesemain ::IO()main = print hogeTesting the ab...
Sorry for the vague question, but
Why does this code space leak? raised the following question:How can Haskell debug memory leaksThis is because in the above case, the program structure was simple, so you can identify the problem by v...
Application Style (++)<$>Just a<*>Just b --=Just abThis is often the case, such as (++)<$>Just a<*>Just b<*>Just c<*>...--Just abc...Would it be possible to write i...
ReverseWords in CodeEval cannot be solved.https://www.codeeval.com/open_challenges/8/I'd like to reverse the list in the solution.Repeat the string for the elements in the list.How do you think you ca...
manlen p1p2=abs(fst p1-fst p2)+abs(snd p1-snd p2)points n = [(x,y)|x<-[-n..n], y<-[-n..n]]]circle n = [p | p <-points n, manlen(0,0)p == n ]I am not sure manlen(0,0)p==n in the last list incl...
In Haskell, I learned that [1,2,3] is the sugar coating syntax for 1:2:3:[].import Data.ListisPrefixOf(1:[]) (1:2:3:[])-- TrueHowever, strictly speaking, 1:[] does not appear to be prefix.1:[]:2:3:[] ...
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