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Today's Topics:
1. Re: populating a bloom filter; stymied by ST monad (Joey Hess)
2. NCurses program cannot be interpreted? (Aditya Manthramurthy)
3. Re: populating a bloom filter; stymied by ST monad
(Chadda? Fouch?)
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Message: 1
Date: Mon, 12 Mar 2012 13:55:40 -0400
From: Joey Hess <[email protected]>
Subject: Re: [Haskell-beginners] populating a bloom filter; stymied by
ST monad
To: [email protected]
Message-ID: <[email protected]>
Content-Type: text/plain; charset="us-ascii"
I mostly figured this out. stToIO allows converting (ST s a) to (IO a)
and so I can update the bloom filter in IO.
I do still wonder if there's a better way, avoiding modifying the filter
inside IO and keeping it in ST.
--
see shy jo
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Message: 2
Date: Tue, 13 Mar 2012 13:54:10 +0530
From: Aditya Manthramurthy <[email protected]>
Subject: [Haskell-beginners] NCurses program cannot be interpreted?
To: [email protected]
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Hi,
I am writing an ncurses based haskell program. I am unable to run it via
ghci - I get an error message saying that UI.NCurses could not be found. If
I run it via "runhaskell", the terminal gets messed up. The only way that I
found works is to compile it using "ghc source.hs" and running the binary.
I can guess that not being able to interpret it has something to do with
the terminal like capabilities of ghci (as ncurses needs a terminal I
suppose). But why does runhaskell not work either? I am just trying to
understand how the three ways to run the program are different.
Thanks,
Aditya
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Message: 3
Date: Tue, 13 Mar 2012 10:18:14 +0100
From: Chadda? Fouch? <[email protected]>
Subject: Re: [Haskell-beginners] populating a bloom filter; stymied by
ST monad
To: Joey Hess <[email protected]>
Cc: [email protected]
Message-ID:
<CANfjZRbyP25D993hXJJv4Gk6x5_oxbvKL3jVANvQkaAuERvo=g...@mail.gmail.com>
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getValues update initial = go initial =<< gen
where
go v [] = return v
go v (f:fs) = do
You say that this stream lazily, so I deduce that gen produce a lazy
IO list. So you should be able to use gen in conjunction with easyList
to get your bloom filter lazily. I'm not sure what the problem is ?
How exactly do you get the elements of your bloom filter from gen
input ?
--
Jeda?
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End of Beginners Digest, Vol 45, Issue 17
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