From: Joel VanderWerf <vjoel@...>
Date: 2004-04-24T14:28:45+09:00
Subject: Re: pushing hash

nobu.nokada@softhome.net wrote:
>   $ irb --prompt xmp

           ^^^^^^^^^^^^

That's a great feature. It would be nice if the output began with a 
comment char '#' so that you could paste into irb (or a source file) and 
run.

>   class Hash
>     alias << :update
>   end
>       ==>nil
>   table = Hash.new {{}}
>       ==>{}
>   table["foo"] <<= {"x"=>1}
>       ==>{"x"=>1}
>   table
>       ==>{"foo"=>{"x"=>1}}
>   table["bar"]

Did you mean something like this?

     table["bar"] << {"y"=>2}

>       ==>{}
>   table
>       ==>{"foo"=>{"x"=>1}}
> 
> Since <<= is assignment "foo" is added, but "bar" is not.