Re: [Haskell-cafe] Mapping string to a function
On Thu, Mar 15, 2012 at 02:21, Haisheng Wu wrote: > Thanks Oliver. That's good enough. > I was ever curious about whether parse String to the function rather > than a mapping. > GHC has the ability to embed an interpreter. You do not want to use it. If you want Perl/Python/Ruby, please use those; they are interpreters and have built-in embedded interpreters for use by programs. (Note that C and C++ are not generally interpreted and also don't have embedded interpreters either.) -- brandon s allbery allber...@gmail.com wandering unix systems administrator (available) (412) 475-9364 vm/sms ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Mapping string to a function
Thanks Oliver. That's good enough.
I was ever curious about whether parse String to the function rather
than a mapping.
-Haisheng
On Thu, Mar 15, 2012 at 1:26 PM, Oliver Batchelor wrote:
> You could store your test data in a named map e.g.
>
> import qualified Data.Map as M
> import System
>
> testSets :: M.Map String [Int]
> testSets = M.fromList
> [ ("testdata", testdata)
> , ("testdata2", testdata2)
> ]
>
> f :: Int -> Something
> f =
>
> main = do
> [arg] <- getArgs
>
> case M.lookup arg testSets of
> Just testSet -> print (map f testSet)
> Nothing -> print "Test set not found!"
>
> On Thu, Mar 15, 2012 at 12:59 PM, Haisheng Wu wrote:
>> Hi there,
>> Do you have any comments / suggestions for the following scenario?
>>
>> I have two list and a function over list
>> testdata :: [Int]
>> testdata2 :: [Int]
>> f testdata = map g testdata
>>
>> What I like to do is choosing what test data via command line arguments.
>> i.e. test.hs testdata2 will run against testdata2
>>
>> I could make it using pattern match between argument and data
>> definition but it is annoy.
>> code here:
>> https://github.com/freizl/dive-into-haskell/blob/master/sandbox/one-in-arith-seq.hs
>>
>> I'm wondering it can be done simply in haskell.
>>
>> Thanks a lot.
>> -Haisheng
>>
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>> Haskell-Cafe mailing list
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Re: [Haskell-cafe] Mapping string to a function
You could store your test data in a named map e.g.
import qualified Data.Map as M
import System
testSets :: M.Map String [Int]
testSets = M.fromList
[ ("testdata", testdata)
, ("testdata2", testdata2)
]
f :: Int -> Something
f =
main = do
[arg] <- getArgs
case M.lookup arg testSets of
Just testSet -> print (map f testSet)
Nothing-> print "Test set not found!"
On Thu, Mar 15, 2012 at 12:59 PM, Haisheng Wu wrote:
> Hi there,
> Do you have any comments / suggestions for the following scenario?
>
> I have two list and a function over list
> testdata :: [Int]
> testdata2 :: [Int]
> f testdata = map g testdata
>
> What I like to do is choosing what test data via command line arguments.
> i.e. test.hs testdata2 will run against testdata2
>
> I could make it using pattern match between argument and data
> definition but it is annoy.
> code here:
> https://github.com/freizl/dive-into-haskell/blob/master/sandbox/one-in-arith-seq.hs
>
> I'm wondering it can be done simply in haskell.
>
> Thanks a lot.
> -Haisheng
>
> ___
> Haskell-Cafe mailing list
> Haskell-Cafe@haskell.org
> http://www.haskell.org/mailman/listinfo/haskell-cafe
___
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[Haskell-cafe] Mapping string to a function
Hi there, Do you have any comments / suggestions for the following scenario? I have two list and a function over list testdata :: [Int] testdata2 :: [Int] f testdata = map g testdata What I like to do is choosing what test data via command line arguments. i.e. test.hs testdata2 will run against testdata2 I could make it using pattern match between argument and data definition but it is annoy. code here: https://github.com/freizl/dive-into-haskell/blob/master/sandbox/one-in-arith-seq.hs I'm wondering it can be done simply in haskell. Thanks a lot. -Haisheng ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
