From: Markus <markus@...>
Date: 2004-10-25T13:46:57+09:00
Subject: Re: hash <<

     I know I'm late to the party here, but would you be happy with:

    class Hash
        alias << update
        end

with which you could write:

  h << {:a => :b} << {:c => :d} << {:e => :f}

   -- Markus

P.S. I still maintain the canonical refutation of your sig is "hug."


On Wed, 2004-10-20 at 07:04, Matt Maycock wrote:
> So, unless you count merge! and update, there doesn't seem to be a way
> to shove stuff into a hash and get the resulting updated hash back. 
> Now, I know merge and update make it real easy:
> 
>   h = {}
>   h.update(:a => :b).update(:c => :d).update(:e => :f)
> 
> but this some how feels unnatural to me.  maybe the following is
> better for me and others?
> 
> ---code---
> require 'ext/singleton_class'
> 
> class Hash
>   def <<(k)
>     if @shift_value.nil? then
>       @shift_value = Object.new.singleton_def(:key) {k}
>     else
>       key, @shift_value = @shift_value.key, nil
>       self[key] = k
>     end
>     self
>   end
> end
> ---end code---
> 
> ---usage---
> h = {}
> h << :language << :ruby << :creator << :matz << :users << :"comp.lang.ruby"
> p h
> ---result---
> {:language=>:ruby, :creator=>:matz, :users=>:"comp.lang.ruby"}
> -------------
> 
> Just a question of flavour, really.