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HASKELL QUESTIONS

`(<*>)` definition for the Applicative functor?
`(<*>)` definition for the Applicative functor?
wish helps you Some Haskell source code (see ref): , For question 1, you left out a very important piece of context.
TAG : haskell
Date : November 24 2020, 04:01 AM , By : asd
Using lenses to update RandomGen inside state struct in Haskell
Using lenses to update RandomGen inside state struct in Haskell
I wish this help you As a general rule, avoid taking Lens / Getter / Setter etc.. as arguments to functions, take ALens / Getting / ASetter instead. These are basically the “specialised to one use scenario” versions, which doesn't require pesky Rank-
TAG : haskell
Date : November 23 2020, 04:01 AM , By : satyaki chakraborty
Haskell: merging list of lists
Haskell: merging list of lists
may help you . I ended with this solution, but it contains duplicates (you can use Data.List(nub) to get rid of them).
TAG : haskell
Date : November 19 2020, 04:01 AM , By : JOHN THOMAS
In Haskell, get a String and a Int from a String
In Haskell, get a String and a Int from a String
I think the issue was by ths following , Giving your function this type is a bit misleading, because there are many input strings for which you could not produce a correct output: what is
TAG : haskell
Date : November 16 2020, 04:01 AM , By : Kia Namin
* Couldn't match type `(Float, Float)' with `[Point]'
* Couldn't match type `(Float, Float)' with `[Point]'
around this issue CODE , print_list requires a [[Point]] -- a list of lists of points
TAG : haskell
Date : November 16 2020, 04:01 AM , By : footy
recursive case expression with data constructor haskell
recursive case expression with data constructor haskell
wish of those help I've got a little problem on recursion with data constructors. , You need to add some explicit matches for reducing constants:
TAG : haskell
Date : November 15 2020, 04:01 AM , By : user2183114
Override poorly encapsulated instance in Haskell
Override poorly encapsulated instance in Haskell
Hope this helps I've run into a similar problem a few times, and it's annoying. Some options to consider, if you haven't:
TAG : haskell
Date : November 14 2020, 04:01 AM , By : ilorgat
Is there a way to point on servant-server 0.15 that is not yet on the last haskell LTS?
Is there a way to point on servant-server 0.15 that is not yet on the last haskell LTS?
I wish this helpful for you All you need to do is specify sub directories in the repository containing the project:
TAG : haskell
Date : November 10 2020, 04:01 AM , By : David Rey
Haskell - Attempting Monad instance - syntax issues
Haskell - Attempting Monad instance - syntax issues
Does that help A guard pattern like [(a, s')]
TAG : haskell
Date : November 08 2020, 04:01 AM , By : user2180832
making a list with where/let clause Haskell
making a list with where/let clause Haskell
hop of those help? I'm trying to make a list in haskell that has the second part of a tupple. I'm making the tuples inside the function however I'm not sure how to link those two (zip and the list making) so my function would work. , Replace fst(lett
TAG : haskell
Date : November 07 2020, 04:01 AM , By : Kavita Pandey
Why Exception can't be handled
Why Exception can't be handled
I think the issue was by ths following , The reason is a bit subtle and has to do with Haskell's laziness.Let's use this version of your example that has the same problem:
TAG : haskell
Date : November 05 2020, 04:01 AM , By : user2179855
Getting the first duplicate element of a circular list
Getting the first duplicate element of a circular list
I think the issue was by ths following , I am trying to get the first duplicate element from a circular list. e.g. , Note that the predicate
TAG : haskell
Date : November 04 2020, 04:01 AM , By : user2179180
Stack Install/Build Packages
Stack Install/Build Packages
I wish this help you To install package using stack simply type stack install packagename. Remember to register it in package.yaml as dependency in your project, otherwise it won't be visible.In your case:
TAG : haskell
Date : November 03 2020, 04:01 AM , By : hamlet
Haskell instances under type variable conditions
Haskell instances under type variable conditions
I wish did fix the issue. Here is an adaptation of the technique applied in set-monad to your case. Note there is, as there must be, some "cheating". The structure includes extra value constructors to represent "return" and "bind". These act as suspe
TAG : haskell
Date : November 02 2020, 04:01 AM , By : arunk
How to convert `[[Either String c]]` into `Either String [[c]]`?
How to convert `[[Either String c]]` into `Either String [[c]]`?
Any of those help You can use sequence for this, but it's not a single step. It commutes one pair of layers of type constructors, but you need to move the Either String constructor out two type layers. Well, our old friend map comes in handy.
TAG : haskell
Date : October 29 2020, 05:01 AM , By : newinjava
Confusion regarding composition in Haskell
Confusion regarding composition in Haskell
hope this fix your issue Perhaps merely visually aligning the types will get you part of the way to some intuition about how the pipeline progresses, and help you make progress towards your next point of confusion!
TAG : haskell
Date : October 28 2020, 07:40 AM , By : user2176820
Haskell as a highly concurrent server
Haskell as a highly concurrent server
I hope this helps . This is precisely what Haskell is great at. And it has excellent multicore parallelism support, so when you use more threads, you can take advantage of extra cores easily. Remember though, Haskell's aimed at great performance on m
TAG : haskell
Date : October 22 2020, 11:12 PM , By : user3849450
Catching Control-C exception in GHC (Haskell)
Catching Control-C exception in GHC (Haskell)
I wish did fix the issue. Wei Hu is correct; the Haskell runtime system deliberately aborts the program when a second control-C is pressed. To get the behavior one might expect:
TAG : haskell
Date : October 21 2020, 11:12 AM , By : user3849969
haskell libmagic how to use it?
haskell libmagic how to use it?
wish helps you There is the package's documentation that contains short descriptions of the important functions (which are not that many). For additional information about what the underlying C library does (and therefore also the Haskell library), h
TAG : haskell
Date : October 21 2020, 11:12 AM , By : user3849935
Understanding Haskell's fibonacci
Understanding Haskell's fibonacci
I hope this helps you . Due to the upvotes I made my comment into an answer.What you see is not a guard but it is list comprehension. For starters think of it as a way to express a mathematical set notation like A = { x | x element N } which means so
TAG : haskell
Date : October 14 2020, 01:11 PM , By : Kyohei Toyoda
Haskell ByteString / Data.Binary.Get question
Haskell ByteString / Data.Binary.Get question
wish helps you It says you expect the second element of the tuple to be a L.ByteString (I assume that L is from Data.ByteString.Lazy) but the getByteString routine returns a strict ByteString from Data.ByteString. You probably want to use getLazyByte
TAG : haskell
Date : October 14 2020, 01:07 PM , By : user3853409
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