Thank you. One is ONLY supposed to supply the list elements for "newListArray" which fill the array in increasing order.
On Tue, Apr 24, 2012 at 3:21 PM, Kevin Charter <kchar...@gmail.com> wrote: > On Tue, Apr 24, 2012 at 3:20 PM, KC <kc1...@gmail.com> wrote: > >> initIdentityMat :: Int -> ST s (STUArray s (Int,Int) ((Int, Int), Double)) >> initIdentityMat m = newListArray ((1,m),(1,m)) ([((i,j), if i == j then >> 1.0 else 0.0) | i <- [1..m], j <- [1..m]] :: [((Int,Int), Double)]) >> >> Doesn't seem to compile, nor do minor variations of the type declaration. >> > > If you use Hoogle to find the type and API docs for 'newListArray', I > believe you'll be able to figure out what's wrong, but I'll give you a > hint. The list you're giving to 'newListArray' contains too much; and the > pair you give it is only half correct. > > Kevin > > -- > Kevin Charter > kevin.char...@acm.org > -- -- Regards, KC
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