[Haskell-cafe] Re: Progress on shootout entries

[Bulat Ziganshin]

Hello Josh,

Wednesday, January 04, 2006, 6:00:16 AM, you wrote:

JG> I was able to significantly speed up the code by replacing the flip function with a function that relies entirely on pattern matching (no splitAts or reverses).  It looks ugly, though:

JG> mangle list@(1:xs) = list
JG> mangle (2:x2:xs) = x2:2:xs
JG> mangle (3:x2:x3:xs) = x3:x2:3:xs
JG> ... and so on.

such code can be generated by Template Haskell. anyway, one of
purposes of TH creation was to add user-defined optimizations to the
language


-- 
Best regards,
 Bulat                            mailto:bulatz at HotPOP.com