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Today's Topics:
1. Re: iterateM (Lukas Braun)
2. Recursive XML schema and feeding into data model (ashwin sathya)
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Message: 1
Date: Tue, 18 Jun 2013 20:51:01 +0200
From: Lukas Braun <[email protected]>
Subject: Re: [Haskell-beginners] iterateM
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Message-ID: <[email protected]>
Content-Type: text/plain; charset=us-ascii
`iterateM_` is in the monad-loops package[1].
Like you suggested, this version returns `m b` and doesn't build up any
list at all.
You can search for functions by name and even type signature on
Hackage[2] or Hayoo[3].
On a different note, for code such as your `iterateM` you should use
do-notation instead of manually writing out the lambdas. It's much
easier on the eyes and this is what do-notation is there for.
[1]
http://hackage.haskell.org/packages/archive/monad-loops/latest/doc/html/Control-Monad-Loops.html#v:iterateM_
[2] http://www.haskell.org/hoogle/
[3] http://holumbus.fh-wedel.de/hayoo/hayoo.html
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Message: 2
Date: Wed, 19 Jun 2013 12:36:39 +0530
From: ashwin sathya <[email protected]>
Subject: [Haskell-beginners] Recursive XML schema and feeding into
data model
To: [email protected]
Message-ID:
<cajivo_hkvlb7dow7frr3wmvx4oovg0a_jgpzqt1q0ducjdu...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Hi,
I have a recursive schema whose data model looks like the following
{-data InformationField = InformationField { name, value :: String }-}
{-deriving (Show, Eq) -}
{-data Fields = Fields { fields :: [InformationField] }-}
{-deriving (Show, Eq)-}
{-data Children = Children { childNodes :: [BuildInformationNode] }-}
{-data BuildInformationNode = BuildInformationNode { field :: Fields,
children :: Children }-}
BuildInformationNode has children which has multiple BuildInformationNode.
I am getting started on HXT, using the samples that they had provided i was
able to pull up individual nodes from xml.
I am having difficult in starting to read the entire xml into the data
model and have one single BuildInformationNode created which represents the
entire xml.
The idea is to implement a show on BuildInformationNode wherein i can
implement for displaying the tree in a format that i require.
Any pointers regarding this would be great.
--
Thanks & Regards,
R Ashwin Sathya
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