Re[Haskell-cafe] cursive referencing
Belka
lambda-belka at yandex.ru
Thu Jan 29 03:13:10 EST 2009
>Yes.
>f somedata1 somedata2 = aa
> where aa = AA somedata1 bb
> bb = BB somedata2 aa
Spasibo, Yevgeny!
Originally I was thinking theoretically about a single plain
lambda-expression, like
(\ somedata1 somedata2 ->
(\ aa bb -> aa (bb aa))
(\ b -> AA somedata1 b)
(\ a -> BB somedata2 a)
)
But in the code "aa (bb aa)" last aa stays lacking an argument, of course,
if we don't consider 1st application "aa (" as having a side effect on aa.
And that's where "separate and rule" shows up it's power (speaking about
"where" and namespacing in general). =)
Belka
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