16 Jul
2009
16 Jul
'09
3:57 a.m.
On Wed, Jul 15, 2009 at 6:35 PM, Ryan Ingram
iterate' f x = x `seq` x : iterate' f (f x) seems better; it doesn't evaluate list elements you don't visit.
iterate'' f x = x : (iterate'' f $! f x) ...seems the most lazy strict iterate. (Bas wishes for a type system that can express the different strictness properties of these functions...)