I'm trying to create a hash table. Yeah, I know, don't use hash tables, but I
need to create something I'm familiar with, not something I've never worked
with before. What's wrong with this code?
Michael
import Prelude hiding (lookup)
import Data.HashTable
data
Hello michael,
Tuesday, November 17, 2009, 10:16:50 PM, you wrote:
I'm trying to create a hash table. Yeah, I know, don't use hash
tables, but I need to create something I'm familiar with, not
something I've never worked with before. What's wrong with this code?
ht = MyHashTable.new (==)
Am Dienstag 17 November 2009 20:16:50 schrieb michael rice:
I'm trying to create a hash table. Yeah, I know, don't use hash tables, but
I need to create something I'm familiar with, not something I've never
worked with before. What's wrong with this code?
Michael
Am Dienstag 17 November 2009 20:36:46 schrieb Daniel Fischer:
What you probably wanted was
type MyHashTable = HashTable String Int -- not data MyHashTable
Just in case it's not clear:
ht - new (==) dummy :: IO MyHashTable
only works at the prompt or in an IO do-block, not at the top level
...@web.de
Subject: Re: [Haskell-cafe] Simple hash table creation
To: haskell-cafe@haskell.org
Date: Tuesday, November 17, 2009, 2:36 PM
Am Dienstag 17 November 2009 20:16:50 schrieb michael rice:
I'm trying to create a hash table. Yeah, I know, don't use hash tables, but
I need to create something I'm
Subject: Re: [Haskell-cafe] Simple hash table creation
To: haskell-cafe@haskell.org
Date: Tuesday, November 17, 2009, 2:45 PM
Am Dienstag 17 November 2009 20:36:46 schrieb Daniel Fischer:
What you probably wanted was
type MyHashTable = HashTable String Int -- not data MyHashTable
Just in case it's
You don't need to create a new type for a String - Int hashtable, you
already get it for free because HashTable is a parameterized type.
Also, although you are apparently trying to make life simpler for
yourself using a HashTable, you are actually making like more
complicated because the
Am Dienstag 17 November 2009 21:09:26 schrieb michael rice:
What is GHC.Int.Int32? Can't find it on Hoogle.
Int32 is the guaranteed-to-be-32-bits integer type, it's defined in the module
GHC.Int,
typically it's imported via Data.Int (because, naturally, using GHC's own
modules isn't
`dummy'
In a stmt of a 'do' expression:
ht - new (==) dummy :: IO MyHashTable
*Main :t dummy
dummy :: String - Int
*Main
--- On Tue, 11/17/09, Daniel Fischer daniel.is.fisc...@web.de wrote:
From: Daniel Fischer daniel.is.fisc...@web.de
Subject: Re: [Haskell-cafe] Simple hash table
Hello Daniel,
Tuesday, November 17, 2009, 11:21:18 PM, you wrote:
The hash function must have a return type of fixed and specified width, or
porting the app
between 32-bit and 64-bit platforms could have enormous performance impact,
so it can't be
plain Int.
i think that the problem with
I've looked at in a
long time.
Thanks for your input.
Michael
--- On Tue, 11/17/09, Gregory Crosswhite gcr...@phys.washington.edu wrote:
From: Gregory Crosswhite gcr...@phys.washington.edu
Subject: Re: [Haskell-cafe] Simple hash table creation
To: michael rice nowg...@yahoo.com
Cc
On Tue, Nov 17, 2009 at 4:00 PM, michael rice nowg...@yahoo.com wrote:
Hi Gregory,
I was wondering about that, because of the following:
[1 of 1] Compiling Main ( hash1.hs, interpreted )
Ok, modules loaded: Main.
*Main ht - new (==) dummy :: IO MyHashTable
*Main dummy mike
7
So, what you're telling me is, my dummy hash function IS being used, and
because of collisions the other values are placed in different locations?
Michael
--- On Tue, 11/17/09, Brad Larsen brad.lar...@gmail.com wrote:
From: Brad Larsen brad.lar...@gmail.com
Subject: Re: [Haskell-cafe] Simple
On Tue, Nov 17, 2009 at 4:22 PM, michael rice nowg...@yahoo.com wrote:
So, what you're telling me is, my dummy hash function IS being used, and
because of collisions the other values are placed in different locations?
Michael
[...]
If Data.HashTable is implemented using separate chaining,
Hello michael,
Wednesday, November 18, 2009, 12:00:58 AM, you wrote:
*Main toList ht
[(miguel,3),(michael,2),(mike,1)]
It seems my dummy function is being ignored.
i wonder why you think so?
your ht has all 3 pairs you ever inserted
inside, they all are inside the same bucket since hash
with data
structures other than lists, so I needed to see how things work.
Thanks, everyone, for the help.
Michael
--- On Tue, 11/17/09, Bulat Ziganshin bulat.zigans...@gmail.com wrote:
From: Bulat Ziganshin bulat.zigans...@gmail.com
Subject: Re[2]: [Haskell-cafe] Simple hash table creation
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