From: hemant <gethemant@...>
Date: 2010-02-04T12:14:16+09:00
Subject: Re: hooking subscript operations in a hash

On Thu, Feb 4, 2010 at 8:41 AM, Ralph Shnelvar <ralphs@dos32.com> wrote:
> RD> On Wed, Feb 3, 2010 at 9:38 PM, Ralph Shnelvar <ralphs@dos32.com> wrote:
>>> In order to help debug something, I'd like to hook the hash subscript operation.
>
>>> I've tried this (and several variants) in irb ... but it doesn't do what I want it to.
>
>
>>> module RalphMod
>>>  def []=(index, value)
>>>    p index
>>>    p value
>>>    if index == 'PATH_INFO' and value == '/undefined'
>>>      puts 'found it!'
>>>    end
>>>    super index, value
>>>  end
>>> end
>
>>> class Hash
>>>  extend RalphMod
>>> end
>
>>> env = {}
>>> env['X'] = 'Y'
>>> env['PATH_INFO'] = '/undefined'


Or why can't you use?

class RalphMod < Hash
  def []=(index, value)
    p index
    p value
    if index == 'PATH_INFO' and value == '/undefined'
      puts 'found it!'
    end
    super index, value
  end
end

env = RalphMod.new()
env['X'] = 'Y'
env['PATH_INFO'] = '/undefined'