From: nobu.nokada@...
Date: 2004-04-24T12:23:40+09:00
Subject: Re: pushing hash

Hi,

At Sat, 24 Apr 2004 12:08:26 +0900,
Hal Fulton wrote in [ruby-talk:98192]:
> But then, pushing hash is illegal in most countries.

IMHO, sometime it feels convenient.

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

Since <<= is assignment "foo" is added, but "bar" is not.

-- 
Nobu Nakada