Re: [Haskell-cafe] Monoid wants a (++) equivalent

30 Jun 2009


      David Leimbach wrote:
...
On Tue, Jun 30, 2009 at 11:54 AM, Brent Yorgey mailto:byorgey@seas.upenn.edu> wrote:
On Tue, Jun 30, 2009 at 09:45:45AM -0700, Bryan O'Sullivan wrote:
    > I've thought for a while that it would be very nice indeed if
    the Monoid
    > class had a more concise operator for infix appending than "a
    `mappend` b".
    > I wonder if other people are of a similar opinion, and if so,
    whether this
    > is worth submitting a libraries@ proposal over.
+1.
IIRC Jules Bean has proposed using (+>) for this purpose, which I
    like.  It has the advantages of (a) not clashing with any other
    (common) operators, (b) making more obvious the fact that mappend is
    not necessarily commutative, and (c) providing the obvious (<+) for
    'flip mappend' which is sometimes useful.
I actually think this proposal is pretty excellent.
I happen to agree.

-- 
Tony Morris
http://tmorris.net/