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Today's Topics:
1. IO question (mike h)
2. Re: IO question (David McBride)
3. Re: IO question (mike h)
4. How to install new GHC ? (Baa)
5. Re: How to install new GHC ? (Sylvain Henry)
6. Re: How to install new GHC ? (Francesco Ariis)
----------------------------------------------------------------------
Message: 1
Date: Mon, 11 Dec 2017 20:56:28 +0000
From: mike h <[email protected]>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Subject: [Haskell-beginners] IO question
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8
I have
input <- readFile “data.txt”
let input’ = splitOn “,” input
….
How do I make that into just one line?
Thanks
Mike
------------------------------
Message: 2
Date: Mon, 11 Dec 2017 16:00:02 -0500
From: David McBride <[email protected]>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Subject: Re: [Haskell-beginners] IO question
Message-ID:
<can+tr41hoszk_quuquok77ybb0p1+nroe_zou_rrhbwsj-z...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
splitOn "," <$> readFile "data.txt"
or perhaps
readFile "data.txt" >>= return . splitOn ","
On Mon, Dec 11, 2017 at 3:56 PM, mike h <[email protected]> wrote:
> I have
>
> input <- readFile “data.txt”
> let input’ = splitOn “,” input
> ….
>
> How do I make that into just one line?
>
> Thanks
>
> Mike
> _______________________________________________
> Beginners mailing list
> [email protected]
> http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners
>
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Message: 3
Date: Mon, 11 Dec 2017 21:24:05 +0000
From: mike h <[email protected]>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Subject: Re: [Haskell-beginners] IO question
Message-ID: <[email protected]>
Content-Type: text/plain; charset="utf-8"
Thank you David. Before posting I tried readFile "data.txt" >>= … but got
errors as I didn’t use return.!!
Mike
> On 11 Dec 2017, at 21:00, David McBride <[email protected]> wrote:
>
> splitOn "," <$> readFile "data.txt"
>
> or perhaps
>
> readFile "data.txt" >>= return . splitOn ","
>
> On Mon, Dec 11, 2017 at 3:56 PM, mike h <[email protected]
> <mailto:[email protected]>> wrote:
> I have
>
> input <- readFile “data.txt”
> let input’ = splitOn “,” input
> ….
>
> How do I make that into just one line?
>
> Thanks
>
> Mike
> _______________________________________________
> Beginners mailing list
> [email protected] <mailto:[email protected]>
> http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners
> <http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners>
>
> _______________________________________________
> Beginners mailing list
> [email protected]
> http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners
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Message: 4
Date: Tue, 12 Dec 2017 13:56:03 +0200
From: Baa <[email protected]>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Subject: [Haskell-beginners] How to install new GHC ?
Message-ID: <20171212135603.61ee055f@Pavel>
Content-Type: text/plain; charset=US-ASCII
Hello, All,
I want to switch to the new GHC (8.2.2) because I hit some
bug in GHC and suppose that it may be fixed in the new version. So, to
try it I changed "resolver: XXX" in my .yaml-files to "lts-9.18". Also I
done something else (I don't remember what exactly) and call
`stack setup ... --reinstall ...`. New GHC have been installed. And I
switched to new LTS - I see it 100%.
But when I run `stack build`, IMHO compiller is old, because if I call
`stack ghci` I see that old GHC (8.0.2) is calling. I'm not familiar
with stack/Haskell tools in-depth and may miss something! For example,
I know that LTS-9.18 is last stable, GHC 8.2.2 is last too, but in
Stackage seems that 9.18 corresponds to 8.2.2.
If I run `stack setup` in the directory with my project again I get:
--cut--
stack will use a sandboxed GHC it installed
For more information on paths, see 'stack path' and 'stack exec env'
To use this GHC and packages outside of a project, consider using:
stack ghc, stack ghci, stack runghc, or stack exec
--cut--
Would somebody explain me what is wrong here and how I can test a
project with new 8.2.2 GHC?
===
Best regards, Paul
------------------------------
Message: 5
Date: Tue, 12 Dec 2017 13:02:49 +0100
From: Sylvain Henry <[email protected]>
To: [email protected]
Subject: Re: [Haskell-beginners] How to install new GHC ?
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8; format=flowed
Hi,
LTS-9.18 uses GHC 8.0.2. You can try a nightly resolver to test GHC
8.2.2, e.g. https://www.stackage.org/nightly-2017-12-10
Sylvain
On 12/12/2017 12:56, Baa wrote:
> Hello, All,
>
> I want to switch to the new GHC (8.2.2) because I hit some
> bug in GHC and suppose that it may be fixed in the new version. So, to
> try it I changed "resolver: XXX" in my .yaml-files to "lts-9.18". Also I
> done something else (I don't remember what exactly) and call
> `stack setup ... --reinstall ...`. New GHC have been installed. And I
> switched to new LTS - I see it 100%.
> But when I run `stack build`, IMHO compiller is old, because if I call
> `stack ghci` I see that old GHC (8.0.2) is calling. I'm not familiar
> with stack/Haskell tools in-depth and may miss something! For example,
> I know that LTS-9.18 is last stable, GHC 8.2.2 is last too, but in
> Stackage seems that 9.18 corresponds to 8.2.2.
>
> If I run `stack setup` in the directory with my project again I get:
>
> --cut--
> stack will use a sandboxed GHC it installed
> For more information on paths, see 'stack path' and 'stack exec env'
> To use this GHC and packages outside of a project, consider using:
> stack ghc, stack ghci, stack runghc, or stack exec
> --cut--
>
> Would somebody explain me what is wrong here and how I can test a
> project with new 8.2.2 GHC?
>
> ===
> Best regards, Paul
> _______________________________________________
> Beginners mailing list
> [email protected]
> http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners
------------------------------
Message: 6
Date: Tue, 12 Dec 2017 13:09:15 +0100
From: Francesco Ariis <[email protected]>
To: [email protected]
Subject: Re: [Haskell-beginners] How to install new GHC ?
Message-ID: <[email protected]>
Content-Type: text/plain; charset=us-ascii
On Tue, Dec 12, 2017 at 01:56:03PM +0200, Baa wrote:
> Would somebody explain me what is wrong here and how I can test a
> project with new 8.2.2 GHC?
Hello Paul, I don't think stack lts has 8.2.2 just yet. Use a
nightly or download/install ghc from here and compile your project
with the new `cabal new-build`.
[1] https://www.haskell.org/ghc/download_ghc_8_2_2.html#binaries
------------------------------
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