Hi Daniel,
On Fri, 14 Jan 2005 21:57:25 +0100, Daniel Fischer
Finally, in several contexts I needed to cons an element to one of a pair of lists, so I defined
infixr 5 &,§ ^^^ Please be aware that you won't find this paragraph symbol on a uk or us keyboard. AFAIK it is just on the german one.
(&) :: a -> ([a],[b]) -> ([a],[b]) x & (xs,ys) = (x:xs,ys)
(§) :: b -> ([a],[b]) -> ([a],[b]) y § (xs,ys) = (xs,y:ys).
I find them useful (though I don't like the symbols, if you have any better ideas, thx) and for splitAt, (&) saves another reduction per step.
I think these operators should be more related to ":" like ":&" "&:" or similar. However, in my opinion this special cons operators could be just functions with a meaningful name like "consfst" and "conssnd". It would provide much more readability. Cheers, Georg -- ---- Georg Martius, Tel: (+49 34297) 89434 ---- ------- http://www.flexman.homeip.net ---------