On Sat, Sep 29, 2007 at 12:05:01PM -0500, Derek Elkins wrote: > On Sat, 2007-09-29 at 17:58 +0100, PR Stanley wrote: > > Hi > > in C type languages a function must be declared before its application. > > Would I be right in thinking that this isn't the case in Functional > > languages? > > For example: > > transmit :: String -> String > > transmit = decode . channel . encode > > channel :: [[Int]] -> [[Int]] > > channel = id > > It's not the case in Haskell. Not only is the above valid, but so is: > > transmit = decode . channel . encode > > channel :: [[Int]] -> [[Int]] > > transmit :: String -> String > > channel = id
It is, however, the case in other functional languages like ML. Declaration-before-use, as a design decision, is independant of functionality. Stefan
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