From: Jeremy McAnally <jeremymcanally@...>
Date: 2008-05-09T00:46:22+09:00
Subject: Re: lambda, ->, haskell, and so on

Not only that but don't you think that it's going to cause conflicts
with current Hash assignment semantics?

--Jeremy

On Thu, May 8, 2008 at 11:35 AM, David A. Black <dblack@rubypal.com> wrote:
> Hi --
>
>
>
>  On Thu, 8 May 2008, Michael Neumann wrote:
>
>
> > ara howard wrote:
> >
> > >
> > > On Apr 30, 2008, at 9:26 PM, Dave Thomas wrote:
> > >
> > > > This is one of those e-mails that I know from the start to be futile,
> but...
> > > >
> > > > For a while now, the
> > > >
> > > >    -> (params) { block }
> > > >
> > > > syntax in Ruby 1.9 has bothered me, but I've never been sure why.
> Today, while playing with pure, it struck me. The '->' sequence is in an
> unexpected place. Having played with some functional languages, I'm used to
> lambdas being written
> > > >
> > > >  \ params -> block
> > > >
> > >
> > > i like the '->' because it suggests very nice multi-block syntax
> > >
> > > filter(
> > >
> > >  :before -> { buf.upcase },
> > >
> > >  :after -> { bug.downcase }
> > >
> > > )
> > >
> >
> > Note that this already works in ruby19:
> >
> >  filter before: -> { buf.upcase }, after: -> { buf.downcase}
> >
>
>  The arrow really looks weird there, since it's not pointing to
>  anything but looks all the more like it is (since there's something on
>  the left). I can imagine people will wonder why:
>
>   one: -> "string"
>
>  doesn't mean that "string" goes with one:.... I don't mind people
>  having to learn stuff, but this just seems like asking for trouble.
>
>
>
>
>  David
>
>  --
>  Rails training from David A. Black and Ruby Power and Light:
>   INTRO TO RAILS         June 9-12            Berlin
>   ADVANCING WITH RAILS   June 16-19           Berlin
>   INTRO TO RAILS         June 24-27           London (Skills Matter)
>  See http://www.rubypal.com for details and updates!
>
>



-- 
http://jeremymcanally.com/
http://entp.com

Read my books:
Ruby in Practice (http://manning.com/mcanally/)
My free Ruby e-book (http://humblelittlerubybook.com/)

Or, my blogs:
http://mrneighborly.com
http://rubyinpractice.com