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29014044_c0
29014044
haskell
0
Title: How to display the list but without a certain item. Problem title: How to display the list but without a certain item. Tags: haskell, list Problem: How to display the list but without a certain item. I have the following list, that contains a list of strings.. I have already searched the orginal list for the lis...
How to display the list but without a certain item. How to display the list but without a certain item. haskell list How George How to display the list but without a certain item. I have the following list, that contains a list of strings.. I have already searched the orginal list for the lists that contain the string ...
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43667374_c0
43667374
haskell
0
Title: Mappend (a1,b1) and (a2,b2) into (a1+a2, b1+b2) Problem title: Mappend (a1,b1) and (a2,b2) into (a1+a2, b1+b2) Tags: monads, monoids, haskell, applicative Problem: Mappend (a1,b1) and (a2,b2) into (a1+a2, b1+b2) I recall this is very basic, and could simply be done with pattern matching even through a lambda lik...
Mappend (a1,b1) and (a2,b2) into (a1+a2, b1+b2) Mappend (a1,b1) and (a2,b2) into (a1+a2, b1+b2) monads monoids haskell applicative Mappend Mappend (a1,b1) and (a2,b2) into (a1+a2, b1+b2) I recall this is very basic, and could simply be done with pattern matching even through a lambda like (\a b -> (fst a + fst b, snd a...
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46384713_c0
46384713
haskell
0
Title: How to know the data type of a value of a sum type Problem title: How to know the data type of a value of a sum type Tags: haskell Problem: How to know the data type of a value of a sum type Say I have such sum type data YesOrNo = Yes | No If somehow I have a value of this type in GHCI >:t yOrN yOrN :: YesOrNo I...
How to know the data type of a value of a sum type How to know the data type of a value of a sum type haskell How YesOrNo Yes How to know the data type of a value of a sum type Say I have such sum type If somehow I have a value of this type in GHCI Is it possible to get the data type of this value so that I know if it'...
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9448384_c0
9448384
haskell
0
Title: Re-define "stringLiteral" token in Parsec.Token Problem title: Re-define "stringLiteral" token in Parsec.Token Tags: parsing, pascal, haskell, parsec Problem: Re-define "stringLiteral" token in Parsec.Token I am developing Pascal language parser in Haskell using Parsec library and I need to r...
Re-define "stringLiteral" token in Parsec.Token Re-define "stringLiteral" token in Parsec.Token parsing pascal haskell parsec Re-define Parsec.Token Re-define "stringLiteral" token in Parsec.Token I am developing Pascal language parser in Haskell using Parsec library and I need to re-define some tok...
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32728329_c0
32728329
haskell
0
Title: How to SPECIALIZE for a hsc2hs type? Problem title: How to SPECIALIZE for a hsc2hs type? Tags: ghc, hsc2hs, haskell Problem: How to SPECIALIZE for a hsc2hs type? I'm trying to use the SPECIALIZE pragma to a type I get through hsc2hs's #type . I tried something like this: {-# SPECIALIZE someFn :: #{type DWORD} ->...
How to SPECIALIZE for a hsc2hs type? How to SPECIALIZE for a hsc2hs type? ghc hsc2hs haskell How SPECIALIZE hsc2hs DWORD Bool How to SPECIALIZE for a hsc2hs type? I'm trying to use the SPECIALIZE pragma to a type I get through hsc2hs's #type . I tried something like this: That attempt fails with a parse error on input ...
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63975163_c0
63975163
haskell
0
Title: Type pararmeter as the data/value constructor Problem title: Type pararmeter as the data/value constructor Tags: haskell Problem: Type pararmeter as the data/value constructor Reading through Numeric.LinearProgramming I am confused by the type declaration data Bound x = x :<=: Double | x :>=: Double | x :&: (Dou...
Type pararmeter as the data/value constructor Type pararmeter as the data/value constructor haskell Type Numeric.LinearProgramming Bound Double Free Show Type pararmeter as the data/value constructor Reading through Numeric.LinearProgramming I am confused by the type declaration Suppose we input Int in place of x . The...
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24806859_c0
24806859
haskell
0
Title: Adding to list, Haskell compiling error Problem title: Adding to list, Haskell compiling error Tags: haskell Problem: Adding to list, Haskell compiling error -- Sample test data type Sales = (String, String, Int) testData :: [Sales] testData :: [("Me and My Broken Heart","Rixton"),("It’s My Birthday","will.i.am"...
Adding to list, Haskell compiling error Adding to list, Haskell compiling error haskell Adding Haskell Sample Sales Broken Heart Rixton Birthday will.i.am Problem Ariana Grande Adding to list, Haskell compiling error I get the error "illegal literal in type : "Me and my broken
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49976795_c0
49976795
haskell
0
Title: Why is RWST ... m a not an instance of MonadReader, MonadState, MonadWriter Problem title: Why is RWST ... m a not an instance of MonadReader, MonadState, MonadWriter Tags: haskell, monad-transformers Problem: Why is RWST ... m a not an instance of MonadReader, MonadState, MonadWriter I just discovered that RWST...
Why is RWST ... m a not an instance of MonadReader, MonadState, MonadWriter Why is RWST ... m a not an instance of MonadReader, MonadState, MonadWriter haskell monad-transformers Why RWST MonadReader MonadState MonadWriter Why is RWST ... m a not an instance of MonadReader, MonadState, MonadWriter I just discovered tha...
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53831352_c0
53831352
haskell
0
Title: HASKELL : handling NULL value in database query with Maybe (or other ...) Problem title: HASKELL : handling NULL value in database query with Maybe (or other ...) Tags: haskell Problem: HASKELL : handling NULL value in database query with Maybe (or other ...) I have this query in SQL used by my Haskell code: let...
HASKELL : handling NULL value in database query with Maybe (or other ...) HASKELL : handling NULL value in database query with Maybe (or other ...) haskell WDS HASKELL Maybe qry_head_WDS DNUM DISC Query bd_rows_WDS Only name::String forM_ Text.unpack Exception UnexpectedNull Text Main HASKELL : handling NULL value in d...
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26697048_c0
26697048
haskell
0
Title: Getting parse error on using head function on a list in haskell Problem title: Getting parse error on using head function on a list in haskell Tags: compiler-errors, haskell Problem: Getting parse error on using head function on a list in haskell I have a function, ground n p, with two input parameters n and p, ...
Getting parse error on using head function on a list in haskell Getting parse error on using head function on a list in haskell compiler-errors haskell head Getting Getting parse error on using head function on a list in haskell I have a function, ground n p, with two input parameters n and p, that returns like this: [...
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27987261_c0
27987261
haskell
0
Title: Verifying condition in Haskell Problem title: Verifying condition in Haskell Tags: list, haskell, recursion Problem: Verifying condition in Haskell I need a function that checks a condition on a list. For example: countP :: [a] -> (a -> Bool) -> Int with the input: countP [1,-2,0,-1,5] (>0) should return 2, beca...
Verifying condition in Haskell Verifying condition in Haskell list haskell recursion Verifying Haskell Bool x:xs Verifying condition in Haskell I need a function that checks a condition on a list. For example: with the input: should return 2, because there are two numbers greater than zero. Here's what i've done so far...
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22437812_c1
22437812
haskell
1
every combinator be expression in terms of "compose" and "reverse compose", and is there a scheme to derive the combination of "compose" and "reverse compose" directly from the structure of the pointful combinator (i.e., without going through the complete rewrite process)? For instance, is it possible to directly deri...
every combinator be expression in terms of "compose" and "reverse compose", and is there a scheme to derive the combination of "compose" and "reverse compose" directly from the structure of the pointful combinator (i.e., without going through the complete rewrite process)? For instance, is it possible to directly deri...
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31911335_c1
31911335
haskell
1
e1 :| e2) = e1 :| (apply xs f e2) apply (L:xs) f (e1 :=> e2) = (apply xs f e1) :=> e2 apply (R:xs) f (e1 :=> e2) = e1 :=> (apply xs f e2) apply (L:xs) f (e1 := e2) = (apply xs f e1) := e2 apply (R:xs) f (e1 := e2) = e1 := (apply xs f e2) apply (x:xs) f (Not' e) = apply xs f e The function works fine. But can I use some...
e1 :| e2) = e1 :| (apply xs f e2) apply (L:xs) f (e1 :=> e2) = (apply xs f e1) :=> e2 apply (R:xs) f (e1 :=> e2) = e1 :=> (apply xs f e2) apply (L:xs) f (e1 := e2) = (apply xs f e1) := e2 apply (R:xs) f (e1 := e2) = e1 := (apply xs f e2) apply (x:xs) f (Not' e) = apply xs f e The function works fine. But can I use some...
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56517712_c0
56517712
haskell
0
Title: Given a list of list of Booleans, return a Boolean Problem title: Given a list of list of Booleans, return a Boolean Tags: haskell Problem: Given a list of list of Booleans, return a Boolean I have a function, defined as follows, that is given a list of lists of Booleans and returns a Boolean: evaluates :: [[Boo...
Given a list of list of Booleans, return a Boolean Given a list of list of Booleans, return a Boolean haskell Given Booleans Boolean Bool y:ys Given a list of list of Booleans, return a Boolean I have a function, defined as follows, that is given a list of lists of Booleans and returns a Boolean: I tried the following ...
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3518619_c0
3518619
haskell
0
Title: How to configure GHCi to automatically import modules Problem title: How to configure GHCi to automatically import modules Tags: haskell, ghci Problem: How to configure GHCi to automatically import modules When I use GHCi, I almost always end up importing Control.Applicative , Data.List , etc. . Is there a way t...
How to configure GHCi to automatically import modules How to configure GHCi to automatically import modules haskell ghci modules How GHCi Control.Applicative Data.List Prelude Database.HDBC Database.HDBC.Sqlite3 System.Directory How to configure GHCi to automatically import modules When I use GHCi, I almost always end ...
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26139360_c0
26139360
haskell
0
Title: Parse json dynamically with Data.Aeson Problem title: Parse json dynamically with Data.Aeson Tags: json, haskell Problem: Parse json dynamically with Data.Aeson I follow docs and try: let st = do result <- decode "{\"name\":\"Dave\",\"age\":2}" --bss flip parseMaybe result $ \obj -> do name <- obj .: "name" retu...
Parse json dynamically with Data.Aeson Parse json dynamically with Data.Aeson json haskell Parse Data.Aeson Dave Parse json dynamically with Data.Aeson I follow docs and try: I get: How to do it properly? What am I doing wrong?
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71759825_c0
71759825
haskell
0
Title: Defining a function that satisfies a type in Haskell Problem title: Defining a function that satisfies a type in Haskell Tags: types, type-inference, haskell, ghci Problem: Defining a function that satisfies a type in Haskell Considering the type foo :: a -> ((b -> a) -> c) -> c I want to create a function that ...
Defining a function that satisfies a type in Haskell Defining a function that satisfies a type in Haskell types type-inference haskell ghci Defining Haskell foo2 Defining a function that satisfies a type in Haskell Considering the type I want to create a function that satisfies this type... I know foo x y = y (\z -> x)...
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41966893_c1
41966893
haskell
1
>>= either (return . Left) (\x -> unIOEither (f x)) instance MonadThrow IOEither where throwM e = IOEither (throwM @IO e) instance MonadCatch IOEither where catch (IOEither aIO) f = IOEither $ catch @IO aIO (unIOEither . f) instance MonadMask IOEither where mask f = IOEither $ mask @IO $ \restore -> unIOEither $ f (IO...
>>= either (return . Left) (\x -> unIOEither (f x)) instance MonadThrow IOEither where throwM e = IOEither (throwM @IO e) instance MonadCatch IOEither where catch (IOEither aIO) f = IOEither $ catch @IO aIO (unIOEither . f) instance MonadMask IOEither where mask f = IOEither $ mask @IO $ \restore -> unIOEither $ f (IO...
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59154523_c0
59154523
haskell
0
Title: How to define data type in GHCi Problem title: How to define data type in GHCi Tags: haskell Problem: How to define data type in GHCi I'm reading from " Making Our Own Types and Typeclasses " part from "Learn You a Haskell for Great Good!". By following the text I wrote the code in GHCi and got an error. data Sh...
How to define data type in GHCi How to define data type in GHCi haskell How GHCi Shape Circle Float Rectangle Variable How to define data type in GHCi I'm reading from " Making Our Own Types and Typeclasses " part from "Learn You a Haskell for Great Good!". By following the text I wrote the code in GHCi and got an erro...
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26895904_c0
26895904
haskell
0
Title: Repeat elements of a list Problem title: Repeat elements of a list Tags: haskell Problem: Repeat elements of a list I am writing a small function repeat k lt. it will repeat all elements in a list k times. This is my approach and following is the code i tried repeat 0 xs = xs repeat k [] = [] repeat k (x:xs) |k ...
Repeat elements of a list Repeat elements of a list haskell Repeat x:xs x:repeat k-1 Repeat elements of a list I am writing a small function repeat k lt. it will repeat all elements in a list k times. This is my approach and following is the code i tried Then i realized i am just removing the head and pushing it back i...
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27302970_c0
27302970
haskell
0
Title: Prelude &quot;and&quot; and &quot;or&quot; functions on empty lists Problem title: Prelude &quot;and&quot; and &quot;or&quot; functions on empty lists Tags: haskell, ghci Problem: Prelude "and" and "or" functions on empty lists I've just started to play with Haskell using GHCI. The REPL comes with a bunch of bui...
Prelude &quot;and&quot; and &quot;or&quot; functions on empty lists Prelude &quot;and&quot; and &quot;or&quot; functions on empty lists haskell ghci Prelude Bool Prelude "and" and "or" functions on empty lists I've just started to play with Haskell using GHCI. The REPL comes with a bunch of built in functions. For exam...
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47257942_c0
47257942
haskell
0
Title: Function with a -&gt; a -&gt; a possible in Haskell? Problem title: Function with a -&gt; a -&gt; a possible in Haskell? Tags: haskell Problem: Function with a -> a -> a possible in Haskell? I am going through Haskell Programming book and an in exercise on page 140, the author states this: A hypothetical functio...
Function with a -&gt; a -&gt; a possible in Haskell? Function with a -&gt; a -&gt; a possible in Haskell? haskell Haskell Write Function with a -> a -> a possible in Haskell? I am going through Haskell Programming book and an in exercise on page 140, the author states this: A hypothetical function a->a->a has two possi...
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5557082_c0
5557082
haskell
0
Title: What does the ($=) (dollar equals) operator do in Haskell GLUT library? Problem title: What does the ($=) (dollar equals) operator do in Haskell GLUT library? Tags: haskell, opengl, syntax Problem: What does the ($=) (dollar equals) operator do in Haskell GLUT library? I was looking through some game code writte...
What does the ($=) (dollar equals) operator do in Haskell GLUT library? What does the ($=) (dollar equals) operator do in Haskell GLUT library? haskell opengl syntax What Haskell GLUT What does the ($=) (dollar equals) operator do in Haskell GLUT library? I was looking through some game code written in Haskell using th...
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25769820_c0
25769820
haskell
0
Title: Minimum of Two Maybes Problem title: Minimum of Two Maybes Tags: option-type, haskell Problem: Minimum of Two Maybes I want to get the minimum of two maybe values, or if one is nothing get the non-nothing one, or return nothing if both inputs are nothing. I can write a simple function to do this, but I suspect t...
Minimum of Two Maybes Minimum of Two Maybes option-type haskell Minimum Two Maybes Ord Maybe Nothing Just Minimum of Two Maybes I want to get the minimum of two maybe values, or if one is nothing get the non-nothing one, or return nothing if both inputs are nothing. I can write a simple function to do this, but I suspe...
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26344514_c0
26344514
haskell
0
Title: (Haskell) Displaying a list in plain English? Problem title: (Haskell) Displaying a list in plain English? Tags: haskell, functional-programming Problem: (Haskell) Displaying a list in plain English? I've been writing a really simple text game engine, and I've come across a problem: I need to be able to print a ...
(Haskell) Displaying a list in plain English? (Haskell) Displaying a list in plain English? haskell functional-programming Haskell Displaying English (Haskell) Displaying a list in plain English? I've been writing a really simple text game engine, and I've come across a problem: I need to be able to print a list of ite...
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37455495_c0
37455495
haskell
0
Title: Generate server sided images (QR codes) and display them on a page with Yesod Problem title: Generate server sided images (QR codes) and display them on a page with Yesod Tags: yesod, qr-code, haskell Problem: Generate server sided images (QR codes) and display them on a page with Yesod I'd like to be able to ge...
Generate server sided images (QR codes) and display them on a page with Yesod Generate server sided images (QR codes) and display them on a page with Yesod yesod qr-code haskell Generate Yesod Generate server sided images (QR codes) and display them on a page with Yesod I'd like to be able to generate arbitrary qr code...
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49986342_c1
49986342
haskell
1
This says that undefined should work for any RuntimeRep , even unlifted types. Here is an example of using undefined as an unboxed, unlifted Int# in GHCi: > :set -XMagicHash > import GHC.Prim > import GHC.Exts > I# (undefined :: Int#) *** Exception: Prelude.undefined I've always thought of undefined as being the same ...
This says that undefined should work for any RuntimeRep , even unlifted types. Here is an example of using undefined as an unboxed, unlifted Int# in GHCi: > :set -XMagicHash > import GHC.Prim > import GHC.Exts > I# (undefined :: Int#) *** Exception: Prelude.undefined I've always thought of undefined as being the same ...
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embed
28857275_c1
28857275
haskell
1
module Syntax.Name and this module is compiled. It is not used in the test module though. I also tried turning the package into a library and having the test-suite build-depends on the library. The linker error proceeds. This is the Haskell Platform from OpenSuSE 13.1, GHC 7.8.3 which locks Cabal to 1.18.1.3. Code sig...
module Syntax.Name and this module is compiled. It is not used in the test module though. I also tried turning the package into a library and having the test-suite build-depends on the library. The linker error proceeds. This is the Haskell Platform from OpenSuSE 13.1, GHC 7.8.3 which locks Cabal to 1.18.1.3. Code sig...
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embed
21650802_c0
21650802
haskell
0
Title: Error in list to tree Problem title: Error in list to tree Tags: tree, list, haskell Problem: Error in list to tree Consider the following type: data LTree a = Leaf a | Fork (LTree a) (LTree a) build :: [(a,Int)] -> LTree a build l = fst (buildaccum 0 l)e I have a list and want to build a tree buildaccum :: Int ...
Error in list to tree Error in list to tree tree list haskell Error LTree Leaf Fork Couldn Error in list to tree Consider the following type: I have a list and want to build a tree In ghci, I get the following error: Can you spot the error, please?
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embed
46895199_c0
46895199
haskell
0
Title: No output will be generated because there is no Main module Problem title: No output will be generated because there is no Main module Tags: program-entry-point, haskell Problem: No output will be generated because there is no Main module I wrote a simple module called Test : module Test (main) where main = putS...
No output will be generated because there is no Main module No output will be generated because there is no Main module program-entry-point haskell Main Test Hello Test.hs Compiling Test.o No output will be generated because there is no Main module I wrote a simple module called Test : However, when i try to compile it...
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embed
54732806_c0
54732806
haskell
0
Title: is this piece of haskell code correct, if so why? Problem title: is this piece of haskell code correct, if so why? Tags: haskell Problem: is this piece of haskell code correct, if so why? the haskell wiki (here : https://wiki.haskell.org/State_Monad ) says the state monad bind operator is defined like this : (>>...
is this piece of haskell code correct, if so why? is this piece of haskell code correct, if so why? haskell State act1 fact2 act2 is this piece of haskell code correct, if so why? the haskell wiki (here : https://wiki.haskell.org/State_Monad ) says the state monad bind operator is defined like this : however it seems i...
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embed
15552397_c0
15552397
haskell
0
Title: Tutorial on stochastic simulation in Haskell Problem title: Tutorial on stochastic simulation in Haskell Tags: stochastic, haskell, simulation, stochastic-process Problem: Tutorial on stochastic simulation in Haskell I'd like to use Haskell for stochastic simulation, but I don't know how. I've read Hutton's 'Pro...
Tutorial on stochastic simulation in Haskell Tutorial on stochastic simulation in Haskell stochastic haskell simulation stochastic-process Tutorial Haskell Tutorial on stochastic simulation in Haskell I'd like to use Haskell for stochastic simulation, but I don't know how. I've read Hutton's 'Programming in Haskell', a...
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embed
40183084_c0
40183084
haskell
0
Title: Is it possible to express the &quot;type of functions that receive 2 nats and return their sum&quot;? Problem title: Is it possible to express the &quot;type of functions that receive 2 nats and return their sum&quot;? Tags: dependent-type, agda, haskell, idris, types Problem: Is it possible to express the "type...
Is it possible to express the &quot;type of functions that receive 2 nats and return their sum&quot;? Is it possible to express the &quot;type of functions that receive 2 nats and return their sum&quot;? dependent-type agda haskell idris types CNat Type a:Type Is it possible to express the "type of functions that recei...
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embed
40334968_c0
40334968
haskell
0
Title: Nested guards on Haskell Problem title: Nested guards on Haskell Tags: haskell Problem: Nested guards on Haskell Haskell disallows the following style of nested guards although they look aesthetically natural and concise: x | condition_1 | condition_1_1 | condition_1_1_1 = expression_1_1_1 | ... | ... | ... I go...
Nested guards on Haskell Nested guards on Haskell haskell Nested Haskell condition_1 condition_1_1 condition_1_1_1 expression_1_1_1 Nested guards on Haskell Haskell disallows the following style of nested guards although they look aesthetically natural and concise: I got a few pointers e.g. 1 and 2 , but still can't he...
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embed
50059974_c0
50059974
haskell
0
Title: cross sum operation in Haskell Problem title: cross sum operation in Haskell Tags: math, haskell, recursion Problem: cross sum operation in Haskell I need to determine a recursive function crosssum :: Int -> Int in Haskell to calculate the cross sum of positive numbers. I am not allowed to use any functions from...
cross sum operation in Haskell cross sum operation in Haskell math haskell recursion Haskell cross sum operation in Haskell I need to determine a recursive function crosssum :: Int -> Int in Haskell to calculate the cross sum of positive numbers. I am not allowed to use any functions from the hierarchical library besid...
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embed
53788045_c0
53788045
haskell
0
Title: Using a lens over something that isn&#x27;t a functor Problem title: Using a lens over something that isn&#x27;t a functor Tags: haskell, haskell-lens Problem: Using a lens over something that isn't a functor I have a lens(') myLens' :: (Functor f) => (a -> f a) -> (s -> f s) And I need a function lensWithoutFun...
Using a lens over something that isn&#x27;t a functor Using a lens over something that isn&#x27;t a functor haskell haskell-lens Using Functor PopType Maybe Using a lens over something that isn't a functor I have a lens(') And I need a function (The particular type I'm interested in is which could be made into a Functo...
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embed
27076491_c0
27076491
haskell
0
Title: Aeson: parse enumerated data types Problem title: Aeson: parse enumerated data types Tags: haskell, aeson, json Problem: Aeson: parse enumerated data types How can I declare an instance of FromJSON of the following data type: data Privacy = Everyone | AllFriends | FriendsOfFriends | Self So that the following st...
Aeson: parse enumerated data types Aeson: parse enumerated data types haskell aeson json Aeson Privacy Everyone AllFriends FriendsOfFriends ALL_FRIENDS FRIENDS_OF_FRIENDS Parsing Aeson: parse enumerated data types How can I declare an instance of FromJSON of the following data type: So that the following string to enum...
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embed
61243217_c0
61243217
haskell
0
Title: Haskell: Typeclass vs passing a function Problem title: Haskell: Typeclass vs passing a function Tags: functional-programming, higher-order-functions, haskell Problem: Haskell: Typeclass vs passing a function To me it seems that you can always pass function arguments rather than using a typeclass. For example ra...
Haskell: Typeclass vs passing a function Haskell: Typeclass vs passing a function functional-programming higher-order-functions haskell Haskell Typeclass Bool Haskell: Typeclass vs passing a function To me it seems that you can always pass function arguments rather than using a typeclass. For example rather than defini...
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10087945_c0
10087945
haskell
0
Title: Piping data between two network sockets on Windows Problem title: Piping data between two network sockets on Windows Tags: haskell, network-programming, sockets, windows Problem: Piping data between two network sockets on Windows Given two network sockets, what is the most efficient way to pipe data from one to ...
Piping data between two network sockets on Windows Piping data between two network sockets on Windows haskell network-programming sockets windows Piping Windows Piping data between two network sockets on Windows Given two network sockets, what is the most efficient way to pipe data from one to the other without touchin...
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34096394_c2
34096394
haskell
2
14, "optionValue": "14" } ] } ] } and here is my code so far: CODE {-# LANGUAGE OverloadedStrings #-} import Data.Aeson import Control.Applicative import qualified Data.ByteString.Lazy.Char8 as BS jsonFile :: FilePath jsonFile = "test.json" getJSON :: IO BS.ByteString getJSON = Code signals: Data.Aeson, Control.Applica...
14, "optionValue": "14" } ] } ] } and here is my code so far: CODE {-# LANGUAGE OverloadedStrings #-} import Data.Aeson import Control.Applicative import qualified Data.ByteString.Lazy.Char8 as BS jsonFile :: FilePath jsonFile = "test.json" getJSON :: IO BS.ByteString getJSON = Code signals: Data.Aeson, Control.Applica...
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35658802_c0
35658802
haskell
0
Title: How do I transform a pattern on booleans to an if condition? Problem title: How do I transform a pattern on booleans to an if condition? Tags: boolean, haskell, if-statement Problem: How do I transform a pattern on booleans to an if condition? I'm new to Haskell and I'm trying to transform the pattern matching b...
How do I transform a pattern on booleans to an if condition? How do I transform a pattern on booleans to an if condition? boolean haskell if-statement How Bool myOr2 Then How do I transform a pattern on booleans to an if condition? I'm new to Haskell and I'm trying to transform the pattern matching below to an if condi...
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18220246_c0
18220246
haskell
0
Title: Type-Pathway in Defining Bind for the List Monad Problem title: Type-Pathway in Defining Bind for the List Monad Tags: haskell Problem: Type-Pathway in Defining Bind for the List Monad In the text Learn You A Haskell , the list monad is defined like so: instance Monad [] where return x = [x] xs >>= f = concat (m...
Type-Pathway in Defining Bind for the List Monad Type-Pathway in Defining Bind for the List Monad haskell Type-Pathway Defining Bind List Monad Type-Pathway in Defining Bind for the List Monad In the text Learn You A Haskell , the list monad is defined like so: Since the bind operator is supposed to convert list-values...
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4988598_c0
4988598
haskell
0
Title: How can I run my haskell functions through Java Problem title: How can I run my haskell functions through Java Tags: java, haskell Problem: How can I run my haskell functions through Java Lets say I have a haskell function add in math.hs How can I run the add function through a Java program and store the output ...
How can I run my haskell functions through Java How can I run my haskell functions through Java java haskell file How Java math.hs How can I run my haskell functions through Java Lets say I have a haskell function add in math.hs How can I run the add function through a Java program and store the output as a variable? M...
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embed
20908056_c0
20908056
haskell
0
Title: How to use IOArray in Haskell records? Problem title: How to use IOArray in Haskell records? Tags: arrays, haskell, record Problem: How to use IOArray in Haskell records? I'm trying to adapt the example code from haskell.org but cant seem to get it to work. http://www.haskell.org/haskellwiki/Arrays#Mutable_IO_ar...
How to use IOArray in Haskell records? How to use IOArray in Haskell records? arrays haskell record Data.Array.IO How IOArray Haskell SomeData Float How to use IOArray in Haskell records? I'm trying to adapt the example code from haskell.org but cant seem to get it to work. http://www.haskell.org/haskellwiki/Arrays#Mut...
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43193602_c1
43193602
haskell
1
1))(A(2))) println(Instance.Instance.toStr(A(1))(A("bla"))) // this compiles, but it should not } How can I define override def toStr: A[_] =>A[_] => String = x => x=> "AA" such that println(Instance.Instance.toStr(A(1))(A("bla"))) does not compile ? As it ( putStrLn $ "bla " ++ (toStr (A 1) (A "String")) ) does not co...
1))(A(2))) println(Instance.Instance.toStr(A(1))(A("bla"))) // this compiles, but it should not } How can I define override def toStr: A[_] =>A[_] => String = x => x=> "AA" such that println(Instance.Instance.toStr(A(1))(A("bla"))) does not compile ? As it ( putStrLn $ "bla " ++ (toStr (A 1) (A "String")) ) does not co...
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48488178_c0
48488178
haskell
0
Title: Can Nullable be used as a functor in C#? Problem title: Can Nullable be used as a functor in C#? Tags: haskell, functor, functional-programming, c%23, nullable Problem: Can Nullable be used as a functor in C#? Consider the following code in C#. public int Foo(int a) { // ... } // in some other method int? x = 0;...
Can Nullable be used as a functor in C#? Can Nullable be used as a functor in C#? haskell functor functional-programming c%23 nullable Can Nullable Foo Maybe Functor Can Nullable be used as a functor in C#? Consider the following code in C#. The last line will return a compilation error cannot convert from 'int?' to 'i...
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54645038_c0
54645038
haskell
0
Title: Haskell, traversable getting values from Maybe [list] Problem title: Haskell, traversable getting values from Maybe [list] Tags: list, option-type, pattern-matching, haskell Problem: Haskell, traversable getting values from Maybe [list] Found the need for using Traversable . It returned a list like this generate...
Haskell, traversable getting values from Maybe [list] Haskell, traversable getting values from Maybe [list] list option-type pattern-matching haskell Maybe Haskell Traversable Just Nothing Haskell, traversable getting values from Maybe [list] Found the need for using Traversable . It returned a list like this generates...
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embed
57489844_c0
57489844
haskell
0
Title: How does readIORef work: creates copy or it does not? Problem title: How does readIORef work: creates copy or it does not? Tags: ioref, do-notation, immutability, io-monad, haskell Problem: How does readIORef work: creates copy or it does not? What exactly does this code do? Is someMap a copy of the object (of :...
How does readIORef work: creates copy or it does not? How does readIORef work: creates copy or it does not? ioref do-notation immutability io-monad haskell How Data.Map.Strict.Map How does readIORef work: creates copy or it does not? What exactly does this code do? Is someMap a copy of the object (of ::Data.Map.Strict....
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14109562_c0
14109562
haskell
0
Title: Parsing XML into records Problem title: Parsing XML into records Tags: xml, haskell Problem: Parsing XML into records I’d like to write a Haskell library to work with a web service API. I get an XML or JSON response from the server, say it looks like this: <foo> <bar>1</bar> <baz>moo</baz> </foo> I want to turn ...
Parsing XML into records Parsing XML into records xml haskell Parsing XML Foo Integer Parsing XML into records I’d like to write a Haskell library to work with a web service API. I get an XML or JSON response from the server, say it looks like this: I want to turn it into a record: How can I abstract this so that I don...
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14224904_c0
14224904
haskell
0
Title: Haskell Eq definition realizing a result Problem title: Haskell Eq definition realizing a result Tags: typeclass, haskell Problem: Haskell Eq definition realizing a result I was reading the definition for the Eq typeclass in the Data library, and I'm confused. At what point is it realized that two values are equ...
Haskell Eq definition realizing a result Haskell Eq definition realizing a result typeclass haskell Haskell Bool Haskell Eq definition realizing a result I was reading the definition for the Eq typeclass in the Data library, and I'm confused. At what point is it realized that two values are equal or not equal. From wha...
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23259718_c0
23259718
haskell
0
Title: Haskell, passing a function to filter in one line? Problem title: Haskell, passing a function to filter in one line? Tags: haskell Problem: Haskell, passing a function to filter in one line? I want to filter everything that is not divisible by 3 from a list in Haskell, this is technically what I want to do filte...
Haskell, passing a function to filter in one line? Haskell, passing a function to filter in one line? haskell Haskell Haskell, passing a function to filter in one line? I want to filter everything that is not divisible by 3 from a list in Haskell, this is technically what I want to do The problem is, mod x 3 won't retu...
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20027707_c0
20027707
haskell
0
Title: What is a Combinator in Haskell Problem title: What is a Combinator in Haskell Tags: combinators, haskell Problem: What is a Combinator in Haskell In Real World Haskell , they describe combinators like this: In Haskell, we refer to functions that take other functions as arguments and return new functions as comb...
What is a Combinator in Haskell What is a Combinator in Haskell combinators haskell What Combinator Haskell Maybe What is a Combinator in Haskell In Real World Haskell , they describe combinators like this: And then later they state that maybeIO function is a combinator and its type signature looks like this: But all I...
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47068188_c0
47068188
haskell
0
Title: How do I use ReadFile with getContents in do? Problem title: How do I use ReadFile with getContents in do? Tags: haskell Problem: How do I use ReadFile with getContents in do? I've been trying to take a user input string and read a dictionary into my main loop but whenever I try to check if my string is in the d...
How do I use ReadFile with getContents in do? How do I use ReadFile with getContents in do? haskell How ReadFile How do I use ReadFile with getContents in do? I've been trying to take a user input string and read a dictionary into my main loop but whenever I try to check if my string is in the dictionary, I get a false...
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56852668_c0
56852668
haskell
0
Title: Unable to create a type-level list with a single element Problem title: Unable to create a type-level list with a single element Tags: haskell, data-kinds Problem: Unable to create a type-level list with a single element I'm scratching my head with the following behaviour. Is there an obvious reason why this is ...
Unable to create a type-level list with a single element Unable to create a type-level list with a single element haskell data-kinds Unable Prelude XDataKinds Bool Expected Unable to create a type-level list with a single element I'm scratching my head with the following behaviour. Is there an obvious reason why this i...
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embed
33720858_c0
33720858
haskell
0
Title: Position of elements Problem title: Position of elements Tags: haskell Problem: Position of elements the function should give me the position of the searched elements. e. : index 'b' "dfbhjbd" -> [3,6] I've got so far: index b (x:xs) = length ( takeWhile ( /= b) xs ) but takeWhile will immediately stop after fin...
Position of elements Position of elements haskell Position x:xs x:tak Position of elements the function should give me the position of the searched elements. e. : index 'b' "dfbhjbd" -> [3,6] I've got so far: index b (x:xs) = length ( takeWhile ( /= b) xs ) but takeWhile will immediately stop after finding the matching...
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embed
26394199_c0
26394199
haskell
0
Title: Using TemplateHaskell to list all names in a namespace Problem title: Using TemplateHaskell to list all names in a namespace Tags: haskell, template-haskell Problem: Using TemplateHaskell to list all names in a namespace I want a TemplateHaskell function variablesInScope :: Q [Name] that returns a list of the Na...
Using TemplateHaskell to list all names in a namespace Using TemplateHaskell to list all names in a namespace haskell template-haskell Using TemplateHaskell Name Info Maybe Using TemplateHaskell to list all names in a namespace I want a TemplateHaskell function variablesInScope :: Q [Name] that returns a list of the Na...
[ 0.0135498046875, -0.01123046875, 0.00811767578125, 0.02294921875, 0.0072021484375, 0.0068359375, 0.0002727508544921875, -0.00099945068359375, -0.01318359375, -0.0390625, 0.0089111328125, -0.0108642578125, 0.0030059814453125, -0.0057373046875, 0.019287109375, 0.02099609375, -0.0096435...
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embed
20499129_c0
20499129
haskell
0
Title: Explain this &#x27;Merge&#x27; Function in Haskell Problem title: Explain this &#x27;Merge&#x27; Function in Haskell Tags: mergesort, sorting, haskell Problem: Explain this 'Merge' Function in Haskell I am learning Haskell and I am having trouble understanding this function. I am implementing mergesort. I have t...
Explain this &#x27;Merge&#x27; Function in Haskell Explain this &#x27;Merge&#x27; Function in Haskell mergesort sorting haskell Explain Merge Haskell x:xt y:yt Explain this 'Merge' Function in Haskell I am learning Haskell and I am having trouble understanding this function. I am implementing mergesort. I have the merg...
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embed
70341841_c0
70341841
haskell
0
Title: How to use show to print character without single quotes? Problem title: How to use show to print character without single quotes? Tags: haskell Problem: How to use show to print character without single quotes? I'm defining an instance of the Show typeclass for a custom data type where in the single lettered ch...
How to use show to print character without single quotes? How to use show to print character without single quotes? haskell How How to use show to print character without single quotes? I'm defining an instance of the Show typeclass for a custom data type where in the single lettered character name is returned but it r...
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embed
44000862_c0
44000862
haskell
0
Title: Convert Type with ByteString to Text? Problem title: Convert Type with ByteString to Text? Tags: haskell Problem: Convert Type with ByteString to Text? Using conduit , my private repo code fails to compile: Expected type: ConduitM Text Void (Control.Monad.Trans.Resource.Internal.ResourceT IO) () Actual type: Con...
Convert Type with ByteString to Text? Convert Type with ByteString to Text? haskell Convert Type ByteString Text Expected ConduitM Control.Monad.Trans.Resource.Internal.ResourceT Actual Helper Convert Type with ByteString to Text? Using conduit , my private repo code fails to compile: How can I define a function?
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embed
70277534_c0
70277534
haskell
0
Title: Can we construct an infinite list that satisfies a given bit predicate? Problem title: Can we construct an infinite list that satisfies a given bit predicate? Tags: haskell, list, bitstring, predicate Problem: Can we construct an infinite list that satisfies a given bit predicate? If we have a given predicate p ...
Can we construct an infinite list that satisfies a given bit predicate? Can we construct an infinite list that satisfies a given bit predicate? haskell list bitstring predicate Can Bool Can we construct an infinite list that satisfies a given bit predicate? If we have a given predicate p :: [Bool] -> Bool that take an ...
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32980278_c0
32980278
haskell
0
Title: Confuse about flip function Problem title: Confuse about flip function Tags: haskell Problem: Confuse about flip function charIn :: Char -> String -> Bool charIn _ [] = False charIn x (y:ys) = x==y || charIn x ys isWord :: String -> Bool isWord = all $ flip charIn "abcdefghijklmnopqrstuvwxyz" -- isword "abc" (Re...
Confuse about flip function Confuse about flip function haskell Confuse Char Bool y:ys Result ab1 Confuse about flip function I'm confuse about the way flip function works. I know it flips first two arguments but how does it work in the above code? Does it just flip the string argument and charIn "abcdefghijklmnopqrstu...
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13706072_c0
13706072
haskell
0
Title: Apply a function to lists in a list Problem title: Apply a function to lists in a list Tags: haskell Problem: Apply a function to lists in a list I want a function that in each of the lists of a list ([[],[],[]]) makes the sum of the elements and if it is even add to that list a 0 and a 1, otherwise. I tried wit...
Apply a function to lists in a list Apply a function to lists in a list haskell Apply Matrix Matr x:xs Apply a function to lists in a list I want a function that in each of the lists of a list ([[],[],[]]) makes the sum of the elements and if it is even add to that list a 0 and a 1, otherwise. I tried with this, but it...
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7185366_c1
7185366
haskell
1
type safety and include 'B4 (Either X Y)' and put in some nice runtime errors for when it has the wrong value. Maybe there's a better way to approach "almost the same" data types? Update: so I worked around by writing a pseudo-fmap: convert :: (a -> b) -> A a -> A b Which at least allows me to separate the conversion ...
type safety and include 'B4 (Either X Y)' and put in some nice runtime errors for when it has the wrong value. Maybe there's a better way to approach "almost the same" data types? Update: so I worked around by writing a pseudo-fmap: convert :: (a -> b) -> A a -> A b Which at least allows me to separate the conversion ...
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8366093_c1
8366093
haskell
1
getting confused by monads (and the context that the trap me into!), and the do statement. I really want to write something like this, but I know it's wrong: firstLine <- contents.head (m,n) <- map read (words firstLine) because contents is not a list - but a monad. Any help on the next step would be great. So I've ju...
getting confused by monads (and the context that the trap me into!), and the do statement. I really want to write something like this, but I know it's wrong: firstLine <- contents.head (m,n) <- map read (words firstLine) because contents is not a list - but a monad. Any help on the next step would be great. So I've ju...
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embed
8585192_c4
8585192
haskell
4
877c150b681896452f205f4, mime-mail-0.4.1.0-05d76f10c6f18f7178113a6d760f371a, monad-control-0.3.1-092d8fe82727181557b850f795f847bc, persistent-0.6.4.3-6e59b956a206ce4f4a9296367507c2b8, persistent-sqlite-0.6.2.1-d32462e51baa09b53b6fd83dae922fc7, shakespeare-css-0.10.4-f8e17e4528d3a37edee74b13441720de, shakespeare-js-0.10...
877c150b681896452f205f4, mime-mail-0.4.1.0-05d76f10c6f18f7178113a6d760f371a, monad-control-0.3.1-092d8fe82727181557b850f795f847bc, persistent-0.6.4.3-6e59b956a206ce4f4a9296367507c2b8, persistent-sqlite-0.6.2.1-d32462e51baa09b53b6fd83dae922fc7, shakespeare-css-0.10.4-f8e17e4528d3a37edee74b13441720de, shakespeare-js-0.10...
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64851169_c0
64851169
haskell
0
Title: Haskell - Check if position is even/odd Problem title: Haskell - Check if position is even/odd Tags: haskell Problem: Haskell - Check if position is even/odd What I need to do is to apply alternately 2 functions in a list. For example: (*2) (-3) [4,5,6,7,8] would result in [8,2,12,4,16] , because 4*2 , 5-3 , 6*2...
Haskell - Check if position is even/odd Haskell - Check if position is even/odd haskell Haskell Check Haskell - Check if position is even/odd What I need to do is to apply alternately 2 functions in a list. For example: would result in [8,2,12,4,16] , because 4*2 , 5-3 , 6*2 , 7-3 , 8*2 ... What I was thinking was and ...
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65653918_c0
65653918
haskell
0
Title: How to move all occurrences of the first element of the list to the end of the list in Haskell? Problem title: How to move all occurrences of the first element of the list to the end of the list in Haskell? Tags: haskell Problem: How to move all occurrences of the first element of the list to the end of the list...
How to move all occurrences of the first element of the list to the end of the list in Haskell? How to move all occurrences of the first element of the list to the end of the list in Haskell? haskell How Haskell x:xs How to move all occurrences of the first element of the list to the end of the list in Haskell? I want ...
[ -0.0003833770751953125, 0.00311279296875, 0.00067138671875, 0.01361083984375, -0.006195068359375, 0.00909423828125, 0.000946044921875, 0.0169677734375, 0.02099609375, -0.0169677734375, -0.006561279296875, 0.0196533203125, 0.0244140625, 0.00799560546875, -0.00119781494140625, -0.0013275...
[ 11249, 47, 25813, 756, 74918, 42, 69098, 5117, 12830, 5303, 3564, 111, 20625, 142508, 1556, 425, 23, 3444, 125663, 136, 1295, 3884, 5036, 107730, 122101, 617, 363, 758, 1019, 30646, 163, 163324, 92714, 96386, 36663, 64457 ]
[ 0.0955810546875, 0.1549072265625, 0.1962890625, 0.1351318359375, 0.1693115234375, 0.118408203125, 0.0849609375, 0.1602783203125, 0.176513671875, 0.1866455078125, 0.2215576171875, 0.0928955078125, 0.1492919921875, 0.2452392578125, 0.1053466796875, 0.0556640625, 0.06597900390625, 0.0...
embed
56942063_c1
56942063
haskell
1
| t == 2 = Type2 handleMessage Type1 msg = handleType1 msg handleMessage Type2 msg = handleType2 msg Again, we can push the switch around, but I'm not really seeing something elegant. I'm hoping for several things: Cohesion: code is bundled together well. Adding a new handle requires little boilerplate. None would be ...
| t == 2 = Type2 handleMessage Type1 msg = handleType1 msg handleMessage Type2 msg = handleType2 msg Again, we can push the switch around, but I'm not really seeing something elegant. I'm hoping for several things: Cohesion: code is bundled together well. Adding a new handle requires little boilerplate. None would be ...
[ 0.0103759765625, 0.0098876953125, -0.021728515625, 0.01470947265625, -0.01336669921875, 0.000301361083984375, -0.0137939453125, 0.0003108978271484375, 0.009033203125, -0.00921630859375, 0.007049560546875, 0.0024871826171875, 0.006256103515625, -0.004638671875, -0.0006561279296875, 0.00...
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[ 0.1126708984375, 0.0926513671875, 0.1290283203125, 0.030914306640625, 0.21533203125, 0.1361083984375, 0.2442626953125, 0.039703369140625, 0.167724609375, 0.0318603515625, 0.05523681640625, 0.0595703125, 0.082275390625, 0.185546875, 0.0258941650390625, 0.1324462890625, 0.0071105957031...
embed
34175173_c0
34175173
haskell
0
Title: Haskell: Could not find module `Data.List.Split&#x27; Problem title: Haskell: Could not find module `Data.List.Split&#x27; Tags: haskell Problem: Haskell: Could not find module `Data.List.Split' I'm trying to split a list in Haskell. As to my knowledge, the easiest way to do this is with splitOn , but this funct...
Haskell: Could not find module `Data.List.Split&#x27; Haskell: Could not find module `Data.List.Split&#x27; haskell Data.List.Split Haskell Could Data.List Haskell: Could not find module `Data.List.Split' I'm trying to split a list in Haskell. As to my knowledge, the easiest way to do this is with splitOn , but this fu...
[ -0.0147705078125, 0.0150146484375, -0.0096435546875, -0.006866455078125, -0.01361083984375, 0.0279541015625, 0.024169921875, -0.00701904296875, 0.0035858154296875, -0.01055908203125, -0.017578125, -0.031005859375, 0.0026092529296875, 0.01519775390625, 0.0018768310546875, -0.00173187255...
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embed
15784841_c0
15784841
haskell
0
Title: What actually $ function does in haskell? Problem title: What actually $ function does in haskell? Tags: dollar-sign, haskell-prelude, operators, syntax, haskell Problem: What actually $ function does in haskell? I know $ :: (a->b) -> a -> b f $ x = f x Intuitively it seems to me, like to say, 1. $ delays the ev...
What actually $ function does in haskell? What actually $ function does in haskell? dollar-sign haskell-prelude operators syntax haskell What What actually $ function does in haskell? I know Intuitively it seems to me, like to say, 1. $ delays the evaluation of the function to its left 2. evaluates whats to its right 3...
[ 0.01275634765625, -0.00020503997802734375, 0.0361328125, -0.003143310546875, -0.00799560546875, 0.01708984375, 0.01513671875, 0.00909423828125, 0.01324462890625, -0.0167236328125, -0.000545501708984375, -0.0037078857421875, -0.00732421875, 0.00677490234375, -0.020751953125, 0.003677368...
[ 4865, 20653, 3650, 32354, 14602, 23, 1556, 142508, 15437, 31304, 4692, 822, 112, 39933, 6002, 86531, 3714, 18425, 37202, 1884, 5154, 615, 8, 5259, 7, 219836, 47, 25737, 787, 151575, 2367, 7108, 1031, 61590, 16750, 15787, 10422, 28219, 15400...
[ 0.08111572265625, 0.209228515625, 0.25244140625, 0.240966796875, 0.1435546875, 0.0816650390625, 0.1329345703125, 0.239990234375, 0.1531982421875, 0.141845703125, 0.020904541015625, 0.1163330078125, 0.031707763671875, 0.167236328125, 0.02752685546875, 0.04071044921875, 0.001708984375,...
embed
17600168_c0
17600168
haskell
0
Title: Haskell newtype syntax Problem title: Haskell newtype syntax Tags: newtype, haskell Problem: Haskell newtype syntax Please help me to understand the following definition: newtype Writer w a = Writer { runWriter :: (a,w) } instance (Monoid w) => Monad (Writer w) where return a = Writer (a,mempty) (Writer (a,w)) >...
Haskell newtype syntax Haskell newtype syntax newtype haskell Haskell Writer Monoid Monad Haskell newtype syntax Please help me to understand the following definition: Why is runWriter is declared as when its actual type is: Once I tried with ghci I realized this must be some implicit argument since type "a" has to be ...
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[ 0.110595703125, 0.2308349609375, 0.1077880859375, 0.27978515625, 0.1317138671875, 0.1484375, 0.0972900390625, 0.0726318359375, 0.2083740234375, 0.1707763671875, 0.1207275390625, 0.0966796875, 0.12060546875, 0.068359375, 0.02783203125, 0.07421875, 0.022003173828125, 0.13623046875, ...
embed
53585992_c0
53585992
haskell
0
Title: How to sort a massiv array along innermost dimension? Problem title: How to sort a massiv array along innermost dimension? Tags: sorting, multidimensional-array, massiv, arrays, haskell Problem: How to sort a massiv array along innermost dimension? I have an Array r Ix2 a such that (Manifest r Ix2 a, Ord a) . I'...
How to sort a massiv array along innermost dimension? How to sort a massiv array along innermost dimension? sorting multidimensional-array massiv arrays haskell How Array Ix2 Manifest Ord Vector How to sort a massiv array along innermost dimension? I have an Array r Ix2 a such that (Manifest r Ix2 a, Ord a) . I'd like ...
[ 0.003387451171875, 0.015869140625, -0.01513671875, 0.01300048828125, -0.006103515625, 0.0111083984375, 0.00726318359375, -0.0107421875, -0.0087890625, 0.000896453857421875, 0.00408935546875, -0.003265380859375, -0.0028533935546875, 0.007659912109375, -0.022216796875, -0.005157470703125...
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[ 0.088623046875, 0.049591064453125, 0.236572265625, 0.247802734375, 0.148681640625, 0.123046875, 0.1097412109375, 0.1195068359375, 0.093505859375, 0.04376220703125, 0.1480712890625, 0.0294189453125, 0.0149078369140625, 0.0843505859375, 0.07305908203125, 0.02752685546875, 0.04663085937...
embed
41551942_c3
41551942
haskell
3
P32; Sp = Sp - 4; call GHC.Num.+_info() args: 20, res: 0, upd: 4; } } Code signals: Can, my_sum, my_sum_s24N_entry, info_tbl, c25x, block_c25x_info, rep:StackRep, c267, my_sum_s24N_info, rep:HeapRep, Fun, fun_type, ArgSpec, stack_info, arg_space, updfr_space, Just, _s24N::P32, _s24O::P32, P32, SpLim, c268, c269, HpLim,...
P32; Sp = Sp - 4; call GHC.Num.+_info() args: 20, res: 0, upd: 4; } } Code signals: Can, my_sum, my_sum_s24N_entry, info_tbl, c25x, block_c25x_info, rep:StackRep, c267, my_sum_s24N_info, rep:HeapRep, Fun, fun_type, ArgSpec, stack_info, arg_space, updfr_space, Just, _s24N::P32, _s24O::P32, P32, SpLim, c268, c269, HpLim,...
[ -0.0166015625, 0.0025177001953125, 0.02001953125, 0.00579833984375, -0.005828857421875, 0.023193359375, -0.00164794921875, 0.004119873046875, 0.0247802734375, -0.035400390625, 0.00830078125, -0.019775390625, -0.00054168701171875, 0.000659942626953125, 0.027099609375, -0.0103759765625, ...
[ 436, 6460, 74, 8019, 2203, 20, 201, 11782, 527, 73265, 839, 316, 1328, 7319, 79459, 387, 3332, 757, 4, 1257, 71, 51912, 28864, 26073, 7, 12, 4171, 759, 11832, 2357, 33, 15123, 3004, 9030, 501, 2588, 425, 46389, 454, 10958, 42378, 2594...
[ 0.1778564453125, 0.33935546875, 0.048614501953125, 0.1942138671875, 0.06268310546875, 0.072509765625, 0.1483154296875, 0.1903076171875, 0.1287841796875, 0.2349853515625, 0.0927734375, 0.1741943359375, 0.1182861328125, 0.228759765625, 0.2027587890625, 0.1151123046875, 0.1214599609375,...
embed
30590909_c0
30590909
haskell
0
Title: Haskell grouping list elements by fst Problem title: Haskell grouping list elements by fst Tags: list-comprehension, haskell Problem: Haskell grouping list elements by fst I'm trying to write a function group::[(Int, Int)]->[[(Int, Int)]] that would group elements of a list of tuples into subgroups dependant on ...
Haskell grouping list elements by fst Haskell grouping list elements by fst list-comprehension haskell Haskell Haskell grouping list elements by fst I'm trying to write a function that would group elements of a list of tuples into subgroups dependant on the first coordinate, ie: should result in I'd imagine list compre...
[ 0.00457763671875, 0.0034942626953125, -0.004302978515625, 0.00341796875, -0.0120849609375, 0.024658203125, -0.013671875, 0.0093994140625, 0.0133056640625, -0.0106201171875, 0.00001823902130126953, 0.005340576171875, -0.0025787353515625, 0.006683349609375, -0.017822265625, 0.00753784179...
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[ 0.1356201171875, 0.234130859375, 0.2242431640625, 0.052734375, 0.1805419921875, 0.1993408203125, 0.08203125, 0.10546875, 0.184326171875, 0.08258056640625, 0.164306640625, 0.1666259765625, 0.03497314453125, 0.1357421875, 0.038665771484375, 0.0670166015625, 0.162353515625, 0.10339355...
embed
13954878_c0
13954878
haskell
0
Title: Why can data type not be serialized although it is member of the show class? Problem title: Why can data type not be serialized although it is member of the show class? Tags: haskell Problem: Why can data type not be serialized although it is member of the show class? data Mine = Firstname String | Lastname Stri...
Why can data type not be serialized although it is member of the show class? Why can data type not be serialized although it is member of the show class? haskell Why Mine Firstname Lastname Show Serialize Not Why can data type not be serialized although it is member of the show class? This does not compile and gives th...
[ 0.0050048828125, 0.0087890625, 0.00848388671875, -0.0029144287109375, -0.0244140625, -0.003326416015625, -0.0081787109375, 0.01397705078125, -0.00421142578125, 0.0005340576171875, -0.0087890625, -0.000644683837890625, 0.0257568359375, 0.03173828125, -0.004058837890625, -0.0034332275390...
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[ 0.1080322265625, 0.08056640625, 0.13427734375, 0.206298828125, 0.1473388671875, 0.21142578125, 0.0924072265625, 0.09088134765625, 0.13623046875, 0.1923828125, 0.1732177734375, 0.0205535888671875, 0.0386962890625, 0.0877685546875, 0.1865234375, 0.1236572265625, 0.060394287109375, 0....
embed
23241587_c0
23241587
haskell
0
Title: C/C++ wrapper for Haskell IO monad Problem title: C/C++ wrapper for Haskell IO monad Tags: haskell, c%2B%2B, linker, static-linking, monads Problem: C/C++ wrapper for Haskell IO monad I want to call a Haskell function from C/C++. I have already read a few tutorials related to that topic, but IO monad calls are n...
C/C++ wrapper for Haskell IO monad C/C++ wrapper for Haskell IO monad haskell c%2B%2B linker static-linking monads Haskell C/C++ wrapper for Haskell IO monad I want to call a Haskell function from C/C++. I have already read a few tutorials related to that topic, but IO monad calls are not covered in them. In particular...
[ 0.0034332275390625, 0.0013580322265625, 0.0047607421875, 0.00063323974609375, -0.01361083984375, 0.0030059814453125, 0.007415771484375, -0.0064697265625, -0.01806640625, -0.04150390625, 0.00299072265625, -0.048095703125, -0.010009765625, -0.0091552734375, 0.0213623046875, 0.00126647949...
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embed
53140675_c0
53140675
haskell
0
Title: Convert a list of digits to a number HASKELL Problem title: Convert a list of digits to a number HASKELL Tags: ghci, haskell, winghci Problem: Convert a list of digits to a number HASKELL I want to make a function in haskell that given a list of single digits, i make the full number. I was thinking in using inte...
Convert a list of digits to a number HASKELL Convert a list of digits to a number HASKELL ghci haskell winghci Convert HASKELL funcion5 x:xs Convert a list of digits to a number HASKELL I want to make a function in haskell that given a list of single digits, i make the full number. I was thinking in using intensive lis...
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[ 0.0662841796875, 0.1842041015625, 0.21484375, 0.0433349609375, 0.234130859375, 0.08251953125, 0.1341552734375, 0.114013671875, 0.2384033203125, 0.148681640625, 0.1317138671875, 0.193359375, 0.0416259765625, 0.08514404296875, 0.17236328125, 0.2467041015625, 0.10009765625, 0.02522277...
embed
29068636_c0
29068636
haskell
0
Title: Haskell nested where clauses Problem title: Haskell nested where clauses Tags: syntax-error, haskell Problem: Haskell nested where clauses I am a beginner coder in haskell, while doing an exercise from the first chapter of this amazing book: http://book.realworldhaskell.org/read/getting-started.html I came acros...
Haskell nested where clauses Haskell nested where clauses syntax-error haskell Haskell wonderbox:ch01 quux.txt WC.hs:5:9 Haskell nested where clauses I am a beginner coder in haskell, while doing an exercise from the first chapter of this amazing book: http://book.realworldhaskell.org/read/getting-started.html I came a...
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embed
19081535_c0
19081535
haskell
0
Title: How can I replace generators if I need only one result? Problem title: How can I replace generators if I need only one result? Tags: generator, haskell Problem: How can I replace generators if I need only one result? I'm playing with Haskell for first time. I've created function that returns first precise enough...
How can I replace generators if I need only one result? How can I replace generators if I need only one result? generator haskell How Double How can I replace generators if I need only one result? I'm playing with Haskell for first time. I've created function that returns first precise enough result. It works as expect...
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[ 0.0654296875, 0.081298828125, 0.04498291015625, 0.2012939453125, 0.2900390625, 0.11328125, 0.06048583984375, 0.1328125, 0.1182861328125, 0.1468505859375, 0.18798828125, 0.122802734375, 0.2154541015625, 0.19287109375, 0.062347412109375, 0.108154296875, 0.0775146484375, 0.03059387207...
embed
30019802_c0
30019802
haskell
0
Title: Haskell function foldl (\x y -&gt; x*2 + y*2) 0 behavior Problem title: Haskell function foldl (\x y -&gt; x*2 + y*2) 0 behavior Tags: haskell, fold Problem: Haskell function foldl (\x y -> x*2 + y*2) 0 behavior I stuck with a problem. What's difference between these two functions: foldl (\x y -> x*2 + y*2) 0 [1...
Haskell function foldl (\x y -&gt; x*2 + y*2) 0 behavior Haskell function foldl (\x y -&gt; x*2 + y*2) 0 behavior haskell fold Haskell Haskell function foldl (\x y -> x*2 + y*2) 0 behavior I stuck with a problem. What's difference between these two functions: where f = \x y -> x*2 + y*2 . I understand result of foldl :...
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56407905_c1
56407905
haskell
1
root </>))) entries ((root, map fst files) :) . concat <$> mapM (walk . (root </>) . fst) dirs In an equation for ‘walk’: walk root = do entries <- liftIO $ listDirectory root (files, dirs) <- partition snd <$> liftM2 (<$>) zip (mapM (liftIO . doesFileExist . (root </>))) entries ((root, map fst files) :) . concat <$> ...
root </>))) entries ((root, map fst files) :) . concat <$> mapM (walk . (root </>) . fst) dirs In an equation for ‘walk’: walk root = do entries <- liftIO $ listDirectory root (files, dirs) <- partition snd <$> liftM2 (<$>) zip (mapM (liftIO . doesFileExist . (root </>))) entries ((root, map fst files) :) . concat <$> ...
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58415407_c0
58415407
haskell
0
Title: Count elements in list with list comprehension Problem title: Count elements in list with list comprehension Tags: list, haskell, function Problem: Count elements in list with list comprehension I'm new to Haskell and trying to write a simple function. I would like to get each element compressed by its upcoming ...
Count elements in list with list comprehension Count elements in list with list comprehension list haskell function Data.List Count Char x:xs Count elements in list with list comprehension I'm new to Haskell and trying to write a simple function. I would like to get each element compressed by its upcoming frequency. Fo...
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12354089_c0
12354089
haskell
0
Title: Ambigous type variable Problem title: Ambigous type variable Tags: type-constraints, haskell Problem: Ambigous type variable I wrote a little haskell program that just counts how many ones there are in a number (Int). When I try to execute it haskell complains about ambigous variable constraints. I know that it ...
Ambigous type variable Ambigous type variable type-constraints haskell Ambigous count_ones n-10 n_new Ambigous type variable I wrote a little haskell program that just counts how many ones there are in a number (Int). When I try to execute it haskell complains about ambigous variable constraints. I know that it comes f...
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23724823_c0
23724823
haskell
0
Title: how do you annotate type in HList Problem title: how do you annotate type in HList Tags: hlist, haskell Problem: how do you annotate type in HList I'm trying to use HList and I need to annotate it but I can't figure out how to do it. If if type the following in ghci >:t "hello" .*. HNil I got the following type ...
how do you annotate type in HList how do you annotate type in HList hlist haskell HList HNil how do you annotate type in HList I'm trying to use HList and I need to annotate it but I can't figure out how to do it. If if type the following in ghci I got the following type signature : HList ((':) * [Char] ('[] *)) Which ...
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5151858_c0
5151858
haskell
0
Title: Running a Haskell program on the Android OS Problem title: Running a Haskell program on the Android OS Tags: android, executable, haskell Problem: Running a Haskell program on the Android OS Forenote: This is an extension of the thread started on /r/haskell Lets start with the facts: Android is one awesome Opera...
Running a Haskell program on the Android OS Running a Haskell program on the Android OS android executable haskell Running Haskell Android Running a Haskell program on the Android OS Forenote: This is an extension of the thread started on /r/haskell Lets start with the facts: Android is one awesome Operating System Has...
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32412743_c0
32412743
haskell
0
Title: I already have an add function how can I use it in multiplication function? Problem title: I already have an add function how can I use it in multiplication function? Tags: haskell Problem: I already have an add function how can I use it in multiplication function? So far I have the definitions for n-1 and n+1 w...
I already have an add function how can I use it in multiplication function? I already have an add function how can I use it in multiplication function? haskell I already have an add function how can I use it in multiplication function? So far I have the definitions for n-1 and n+1 with suc and inc respectively How can ...
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27322591_c0
27322591
haskell
0
Title: Haskell Guards and SublimeText 3 Problem title: Haskell Guards and SublimeText 3 Tags: syntax, syntax-highlighting, sublimetext3, sublimetext, haskell Problem: Haskell Guards and SublimeText 3 I switched over to Sublime Text 3 but now that I was coding some Haskell in ST3 I noticed something quite odd, which is ...
Haskell Guards and SublimeText 3 Haskell Guards and SublimeText 3 syntax syntax-highlighting sublimetext3 sublimetext haskell Haskell Guards SublimeText sublimetext3 Haskell Guards and SublimeText 3 I switched over to Sublime Text 3 but now that I was coding some Haskell in ST3 I noticed something quite odd, which is t...
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30369954_c0
30369954
haskell
0
Title: How does this foldl-based function work: &quot;myreverse = foldl (flip (:)) []&quot;? Problem title: How does this foldl-based function work: &quot;myreverse = foldl (flip (:)) []&quot;? Tags: haskell, foldleft, recursion Problem: How does this foldl-based function work: "myreverse = foldl (flip (:)) []"? I am l...
How does this foldl-based function work: &quot;myreverse = foldl (flip (:)) []&quot;? How does this foldl-based function work: &quot;myreverse = foldl (flip (:)) []&quot;? haskell foldleft recursion How How does this foldl-based function work: "myreverse = foldl (flip (:)) []"? I am learning haskell and I tried to writ...
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12318985_c0
12318985
haskell
0
Title: Print NominalDiffTime in Haskell Problem title: Print NominalDiffTime in Haskell Tags: type-conversion, haskell Problem: Print NominalDiffTime in Haskell I have piece of code like this in my Haskell program: ... start <- getCurrentTime ... end <- getCurrentTime ... delta = end `diffUTCTime` start ... After this,...
Print NominalDiffTime in Haskell Print NominalDiffTime in Haskell type-conversion haskell Print NominalDiffTime Haskell Num PrintfArg Print NominalDiffTime in Haskell I have piece of code like this in my Haskell program: After this, delta has type NominalDiffTime . As written in the documentation, this type in inherite...
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25352757_c0
25352757
haskell
0
Title: Installing mingwrt into the haskell-platform without mingw-get Problem title: Installing mingwrt into the haskell-platform without mingw-get Tags: haskell, mingw, windows, haskell-platform Problem: Installing mingwrt into the haskell-platform without mingw-get The haskell-platform (2014.2.0.0) ships MingGW, but ...
Installing mingwrt into the haskell-platform without mingw-get Installing mingwrt into the haskell-platform without mingw-get haskell mingw windows haskell-platform Installing Installing mingwrt into the haskell-platform without mingw-get The haskell-platform (2014.2.0.0) ships MingGW, but without mingw-get. However, t...
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26452874_c1
26452874
haskell
1
s', count <> onePut)) Side note, I am also stumped as to how I would get the "count" part of the state' out of the state' so I can write it on the screen Maybe it's more helpful to explain what run is supposed to do. For instance if you use a function label, that labels each node in a tree with an incrementing number ...
s', count <> onePut)) Side note, I am also stumped as to how I would get the "count" part of the state' out of the state' so I can write it on the screen Maybe it's more helpful to explain what run is supposed to do. For instance if you use a function label, that labels each node in a tree with an incrementing number ...
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26964933_c0
26964933
haskell
0
Title: Folding over an ITree Problem title: Folding over an ITree Tags: haskell Problem: Folding over an ITree Given the following ITree , from Typeclassopedia : data ITree a = Leaf (Int -> a) | Node [ITree a] What's the proper signature for foldTree - fold over the entire tree? Here's my incorrect attempt that does no...
Folding over an ITree Folding over an ITree haskell Folding ITree Leaf Node Folding over an ITree Given the following ITree , from Typeclassopedia : data ITree a = Leaf (Int -> a) | Node [ITree a] What's the proper signature for foldTree - fold over the entire tree? Here's my incorrect attempt that does not compile: Ho...
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28888587_c0
28888587
haskell
0
Title: Can GHC warn about the uses of dangerous non-total functions? Problem title: Can GHC warn about the uses of dangerous non-total functions? Tags: ghc, crash, error-handling, haskell, compiler-warnings Problem: Can GHC warn about the uses of dangerous non-total functions? I have been writing quickly some code in H...
Can GHC warn about the uses of dangerous non-total functions? Can GHC warn about the uses of dangerous non-total functions? ghc crash error-handling haskell compiler-warnings Can GHC Can GHC warn about the uses of dangerous non-total functions? I have been writing quickly some code in Haskell, and used a dangerous non-...
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20967408_c0
20967408
haskell
0
Title: Cabal - how to install specific version of package Problem title: Cabal - how to install specific version of package Tags: cabal, haskell Problem: Cabal - how to install specific version of package I need for example a minor version of a package, for example persistent-postgresql .. or hdbc-mysql or whatever. If...
Cabal - how to install specific version of package Cabal - how to install specific version of package cabal haskell Cabal Cabal - how to install specific version of package I need for example a minor version of a package, for example persistent-postgresql .. or hdbc-mysql or whatever. If I run it will install persisten...
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43778866_c1
43778866
haskell
1
" = return $ Backend BackendB test :: String -> IO () test name = createBackend name >>= \case Backend imp -> withConn imp 10 100 func If i do not wrap the IBackend returned by createBackend in data Backend , the createBackend function won't compile. But now i have to use a case statement in test function to unbox IBac...
" = return $ Backend BackendB test :: String -> IO () test name = createBackend name >>= \case Backend imp -> withConn imp 10 100 func If i do not wrap the IBackend returned by createBackend in data Backend , the createBackend function won't compile. But now i have to use a case statement in test function to unbox IBac...
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48131758_c0
48131758
haskell
0
Title: Haskell: how to get the common words Problem title: Haskell: how to get the common words Tags: haskell Problem: Haskell: how to get the common words I am trying to do drop common words function, but I do not know how to get or find the common word list. Do I need to create a common words list? Thank you The ques...
Haskell: how to get the common words Haskell: how to get the common words haskell Haskell Takes English Returns Haskell: how to get the common words I am trying to do drop common words function, but I do not know how to get or find the common word list. Do I need to create a common words list? Thank you The question : ...
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48884276_c0
48884276
haskell
0
Title: Why doesn&#x27;t this function work if I use &quot;[xs]&quot; instead of &quot;xs&quot;? Problem title: Why doesn&#x27;t this function work if I use &quot;[xs]&quot; instead of &quot;xs&quot;? Tags: haskell Problem: Why doesn't this function work if I use "[xs]" instead of "xs"? split :: [a] -> Int -> ([a], [a])...
Why doesn&#x27;t this function work if I use &quot;[xs]&quot; instead of &quot;xs&quot;? Why doesn&#x27;t this function work if I use &quot;[xs]&quot; instead of &quot;xs&quot;? haskell Why Why doesn't this function work if I use "[xs]" instead of "xs"? The same code works if I give the variable as xs instead of [xs] ,...
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15558577_c0
15558577
haskell
0
Title: finding the position of an element from a list of list Problem title: finding the position of an element from a list of list Tags: list, haskell Problem: finding the position of an element from a list of list I want to find the position of an element from a list of list. FOr example , in a given list [[1,2,3],[4...
finding the position of an element from a list of list finding the position of an element from a list of list list haskell a finding the position of an element from a list of list I want to find the position of an element from a list of list. FOr example , in a given list [[1,2,3],[4,5,6],[7,8,9]] I want to find the po...
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44174573_c0
44174573
haskell
0
Title: Changing Global Cabal Flags from the Command Line with Stack Problem title: Changing Global Cabal Flags from the Command Line with Stack Tags: cabal, haskell-stack, haskell Problem: Changing Global Cabal Flags from the Command Line with Stack From a project's cabal file: flag buildAll Description: Build all prog...
Changing Global Cabal Flags from the Command Line with Stack Changing Global Cabal Flags from the Command Line with Stack cabal haskell-stack haskell the Changing Global Cabal Flags Command Line Stack Description Build Default Changing Global Cabal Flags from the Command Line with Stack From a project's cabal file: I w...
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832569_c0
832569
haskell
0
Title: List of Functional code snippets for Procedural Programmers? Problem title: List of Functional code snippets for Procedural Programmers? Tags: ocaml, haskell, code-snippets, functional-programming, f%23 Problem: List of Functional code snippets for Procedural Programmers? Sometimes I still get stuck trying to tr...
List of Functional code snippets for Procedural Programmers? List of Functional code snippets for Procedural Programmers? ocaml haskell code-snippets functional-programming f%23 List Functional Procedural Programmers List of Functional code snippets for Procedural Programmers? Sometimes I still get stuck trying to tran...
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