[Haskell-cafe] Mapping string to a function
saulzar at gmail.com
Thu Mar 15 06:26:01 CET 2012
You could store your test data in a named map e.g.
import qualified Data.Map as M
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 <freizl at gmail.com> 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.
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