From: Ralph Shnelvar <ralphs@...32.com>
Date: 2010-02-04T18:55:53+09:00
Subject: Re: hooking subscript operations in a hash

RN> Is env['X'] = 'Y' the same as env[]=('X','Y') ?
RN> Since you defined a method with def []= so I think env[]=('X','Y') is
RN> easier for understanding.

First ... I think you meant
	env[]={'X', 'Y'}
(braces instead of parenthesis)

The first form
	env[]={'X', 'Y'}
means
	Create and/or replace a hash table called "env" and stuff it with an index of 'X' and a value of 'Y'

The second form
	env['X'] = 'Y'
means
	Take an existing hash table called "env" and add/replace the index 'X' in that table with the value 'Y'