From: Daniel Baird <danielbaird@...>
Date: 2006-06-27T09:03:30+09:00
Subject: Re: << for Hash?

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On 6/27/06, Simon Baird <simon.baird@gmail.com> wrote:
>
> On 6/26/06, Matthew Harris <shugotenshi@gmail.com> wrote:
>
> > I like Michael's solution.
> >
> > The {}'s are not needed, as long as the hash is the only or last
> > argument to a method.
> >
> > {:a => 1, :b => 2}.merge(:c => 3, :d => 4)
> > #=> {:a => 1, :b => 2, :c => 3, :d => 4)
> >
> I noticed this:
>
> class Hash
>   def <<(arg)
>     self.merge!(arg)
>   end
> end
>
> x = { :a => 1 }
>
> x.<< :f => 1, :g => 1   # works
>
> x << :h => 1, :i => 1   # syntax error
>
> Is there a way to make the above work? I don't care really since I think
> the
> following is clearer:
> x << { :h => 1, :i => 1 }  # my preferred


No, sorry.. as pointed out in another recent thread, overriding the <<
method can change the behaviour but not the syntax of the << operator.

Curses, huh.

;D


-- 
Daniel Baird
http://danielbaird.com (TiddlyW;nks! :: Whiteboard Koala :: Blog :: Things
That Suck)

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