> Can I suggest that an alternative solution might be the following:
>
> Suppose Perl 6 had two new very low precedence operators: ~> and <~
> (a.k.a. "bind rightwards" and "bind leftwards")
>
> @out = @a ~> grep {...} ~> map {...} ~> sort;
>
> @out = sort <~ map {...} <~ grep {...} <~ @a;
>
> That way, everything is still a method call, the ultra-low precedence of
> <~ and ~> eliminate the need for parens, and (best of all) the
> expressions actually *look* like processing sequences.
(a) OOh, shiny!
(b) Can <~ and ~> be used at the same time?
I'm not entirely sure of what functions take two array params
meaningfully, but could we do:
@a ~> grep (...) ~> sort ~> for <~ map (...) <~ @b {
(for content goes here)
}
With the understanding that
(1) EWWW, that is horribly ugly, but it was the first thing I could come
up with that meaningfully takes two list args
(2) Anyone who ACTUALLY does this with a for be shot on sight?
It would be more meaningful in another function that takes two lists and
does something useful, but without a body block ... More of a
@a ~> grep (...) ~> apply <~ sort <~ @b ;
So that the grep'd elements of @a are applied, 1:1, to the sorted @b ... ala
apply (grep (..., @a), sort(@b));
(again, more useful for a longer chain)
--attriel
