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Today's Topics:
1. Re: Aeson: parsing json with 'data' field (Derek McLoughlin)
2. Re: Aeson: parsing json with 'data' field (Miro Karpis)
3. Re: Connecting telnet connection to a wx widget
(Henk-Jan van Tuyl)
----------------------------------------------------------------------
Message: 1
Date: Sat, 4 Oct 2014 17:40:59 +0100
From: Derek McLoughlin <[email protected]>
To: [email protected], The Haskell-Beginners Mailing List -
Discussion of primarily beginner-level topics related to Haskell
<[email protected]>
Subject: Re: [Haskell-beginners] Aeson: parsing json with 'data' field
Message-ID:
<CAAw9fmnKsupM0a=FNNKpA2UR=DYKme540=qrmjzpedcym8o...@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
{-# LANGUAGE OverloadedStrings #-}
import Data.Aeson ((.:), (.:?), decode, FromJSON(..), Value(..))
import Control.Applicative ((<$>), (<*>))
import qualified Data.ByteString.Lazy.Char8 as BS
data Foo = Foo {
_data :: String -- call it anything you like
}
deriving (Show)
instance FromJSON Foo where
parseJSON (Object v) =
Foo <$>
(v .: "data")
Testing:
ghci> let json = BS.pack "{\"data\":\"hello\"}"
ghci> let (Just x) = decode json :: Maybe Foo|
ghci> x
Foo {_data = "hello"}
On 4 October 2014 08:07, Miro Karpis <[email protected]> wrote:
> Hi,
> please can you help me with this.......I have a json file which contains a
> field with name "data". Problem is that I can not create a data type with
> "data", (or can I)? How else can I handle this? I know I can convert all
> json to Object and then search for the field....but I was hoping for some
> friendly/easier option.
>
>
> json example:
>
> {
> "data" : {
> "foo" : "bar"
> }
> }
>
>
> below definition returns: parse error on input ?data?
> data Foo = Foo {
> data :: String
> }
>
>
> Cheers,
> Miro
>
> _______________________________________________
> Beginners mailing list
> [email protected]
> http://www.haskell.org/mailman/listinfo/beginners
>
------------------------------
Message: 2
Date: Sat, 4 Oct 2014 21:23:46 +0200
From: Miro Karpis <[email protected]>
To: Derek McLoughlin <[email protected]>
Cc: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Subject: Re: [Haskell-beginners] Aeson: parsing json with 'data' field
Message-ID:
<cajnnbxhj7t2wsuvtzjeq+hj3xpnfaltyxa6odb1+dxkt4u9...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
thank you, that helped ;-)
On Sat, Oct 4, 2014 at 6:40 PM, Derek McLoughlin <[email protected]
> wrote:
> {-# LANGUAGE OverloadedStrings #-}
>
> import Data.Aeson ((.:), (.:?), decode, FromJSON(..), Value(..))
> import Control.Applicative ((<$>), (<*>))
> import qualified Data.ByteString.Lazy.Char8 as BS
>
> data Foo = Foo {
> _data :: String -- call it anything you like
> }
> deriving (Show)
>
> instance FromJSON Foo where
> parseJSON (Object v) =
> Foo <$>
> (v .: "data")
>
> Testing:
>
> ghci> let json = BS.pack "{\"data\":\"hello\"}"
> ghci> let (Just x) = decode json :: Maybe Foo|
> ghci> x
> Foo {_data = "hello"}
>
>
>
> On 4 October 2014 08:07, Miro Karpis <[email protected]> wrote:
> > Hi,
> > please can you help me with this.......I have a json file which contains
> a
> > field with name "data". Problem is that I can not create a data type with
> > "data", (or can I)? How else can I handle this? I know I can convert all
> > json to Object and then search for the field....but I was hoping for some
> > friendly/easier option.
> >
> >
> > json example:
> >
> > {
> > "data" : {
> > "foo" : "bar"
> > }
> > }
> >
> >
> > below definition returns: parse error on input ?data?
> > data Foo = Foo {
> > data :: String
> > }
> >
> >
> > Cheers,
> > Miro
> >
> > _______________________________________________
> > Beginners mailing list
> > [email protected]
> > http://www.haskell.org/mailman/listinfo/beginners
> >
>
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------------------------------
Message: 3
Date: Sun, 05 Oct 2014 00:41:44 +0200
From: "Henk-Jan van Tuyl" <[email protected]>
To: [email protected], Tilmann <[email protected]>
Subject: Re: [Haskell-beginners] Connecting telnet connection to a wx
widget
Message-ID: <op.xm79by0wpz0j5l@alquantor>
Content-Type: text/plain; charset=utf-8; format=flowed; delsp=yes
On Wed, 01 Oct 2014 12:37:36 +0200, Tilmann <[email protected]> wrote:
> Hi,
>
> I am stuck at this problem. I want to read from a telnet connection and
> display the result in a wxHaskell widget (textCtrl). I got the widget
> and I got the connection piped to stdout, but I don?t know how to
> connect the two. Any help is greatly appreciated!
:
:
As you haven't got an answer yet, it looks like there is no one with both
wxHaskell and Conduit knowledge on this mailing list; I suggest to try the
Haskell Caf? mailing list.
Regards,
Henk-Jan van Tuyl
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