[Haskell-cafe] Rewrite without parenthesis

[Theodore Lief Gannon]

Francesco, you missed a piece. 'head' is part of the expression. :) What
Carl is looking for is one or the other of these:

head $ tail [1,2,3]
-- or --
head . tail $ [1,2,3]

The first one is shorter and fine for inlining, but I generally prefer the
second form... it helps intuition about eta reduction, refactoring, and
additional composition.

On Aug 18, 2016 5:19 AM, "Francesco Ariis" <fa-ml at ariis.it> wrote:

> On Thu, Aug 18, 2016 at 05:03:21AM -0700, Carl Petersen wrote:
> > How do you rewrite head (tail [1,2,3]) without parenthesis.
>
> Hello Carl, simply
>
>     λ> tail [1,2,3]
>     [2,3]
>
> will do! Haskell is not a Lisp, no need to wrap expressions
> around ().
> _______________________________________________
> Haskell-Cafe mailing list
> To (un)subscribe, modify options or view archives go to:
> http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe
> Only members subscribed via the mailman list are allowed to post.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.haskell.org/pipermail/haskell-cafe/attachments/20160818/bbe24777/attachment.html>