| The library report defines
|
| -- Diagonal of a square matrix
| diag :: (Ix a) = Array (a,a) b - Array a b
| diag x = ixmap (l,u) (\i-(i,i)) x
|where ((l,l'),(u,u')) | l == l' u == u' = bounds x
And that is indeed a stupid definition. It's like saying
x = if x2 then 1
Simon,
On Tue, Nov 27, 2001 at 02:28:45AM -0800, Simon Peyton-Jones wrote:
| I am also curious why, for example,
|
| row :: (Ix a, Ix b) = a - Array (a,b) c - Array b c
| row i x = ixmap (l',u') (\j-(i,j)) x where ((l,l'),(u,u'))
| = bounds x
|
| isn't written as
|
| row ::
Hi guys,
The library report defines
-- Diagonal of a square matrix
diag :: (Ix a) = Array (a,a) b - Array a b
diag x = ixmap (l,u) (\i-(i,i)) x
where ((l,l'),(u,u')) | l == l' u == u' = bounds x
but ghc, hugs and nhc98 all loop (trying to get and test the value of l
I believe).
I
