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Diffstat (limited to 'testsuite/tests/array/should_run/arr011.hs')
| -rw-r--r-- | testsuite/tests/array/should_run/arr011.hs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/testsuite/tests/array/should_run/arr011.hs b/testsuite/tests/array/should_run/arr011.hs new file mode 100644 index 0000000000..1516b0e866 --- /dev/null +++ b/testsuite/tests/array/should_run/arr011.hs @@ -0,0 +1,20 @@ +-- !!! Array - array difference operator +-- +-- +module Main(main) where + +import Data.Array +import Data.Ix + +hist :: (Ix a, Num b) => (a,a) -> [a] -> Array a b +hist bnds is = accumArray (+) 0 bnds [(i,1) | i <- is , inRange bnds i] + +main = + let + a1 = hist (0,10) (concat $ take 2 $ repeat [1..20]) + in + print a1 >> + print (a1 // [ (i,0) | i<-[0..10], odd i]) + + + |