From: Marnen Laibow-Koser <marnen@...>
Date: 2010-01-24T01:56:34+09:00
Subject: Re: how to define []=

Colin Bartlett wrote:
> On Sat, Jan 23, 2010 at 2:29 PM, hagbard <sin3141592@googlemail.com> 
> wrote:
>>> But how do we define the set method `[]='?
>>
>> Just define it.
>>   def []=(i, value)
>> �  @ary[i] = value
>>   end
> 
> And for a two dimensional array:
> class QQ
>   def initialize( arr ) ; @ary = arr ; end
>   def []( i, j ) ; @ary[i][j] ; end
>   def []=( i, j, value ) ; @ary[i][j] = value ; end
> end

First of all, I don't think that will work.  Second, it's a bad idea: to 
experienced Ruby programmers, [i, j] is slicing, not subscripting.  Just 
use the standard [i][j].

> 
> a = [ [0, 1], [10], [20, 21, 22] ]
> q = QQ.new( a )
> puts q[2, 1]
> q[2, 1] = 2211
> puts q[2, 1]

Best,
--
Marnen Laibow-Koser
http://www.marnen.org
marnen@marnen.org
-- 
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