[Haskell-cafe] How to solve this problem?It's quite easy in PHP.

[Donald Bruce Stewart]

ndmitchell:
> Hi
> 
> Eeek, a solution that does monadic maps and require's rank 2 types!
> 
> arr = [('a',1), ('b',2), ('c',3)]
> showAll = lines (map showItem arr)
> showItem (a,n) = a : " = " ++ show n
> main = putStr showAll
> 
> I've broken this up a bit more than usual - most people would probably
> just put showAll inside main, but this separates out the concepts. arr
> is the data, which you could construct with a zip if that really is
> all there is to it. showItem shows a single item, showAll shows them
> all, and main just prints out the information.
> 
> And this solution is Haskell 98, anything that uses printf is Haskell' only.
> 
> Thanks
> 
> Neil

$ hugs +98
__   __ __  __  ____   ___      _________________________________________
||   || ||  || ||  || ||__      Hugs 98: Based on the Haskell 98 standard
||___|| ||__|| ||__||  __||     Copyright (c) 1994-2005
||---||         ___||           World Wide Web: http://haskell.org/hugs
||   ||                         Report bugs to: hugs-bugs at haskell.org
||   || Version: March 2005     _________________________________________

Haskell 98 mode: Restart with command line option -98 to enable extensions

Type :? for help
Hugs.Base> :l Text.Printf
Text.Printf> printf "%d" (1::Int) :: String
"1"



Fix YHC!

:-)

-- Don