From: Leslie Viljoen <leslie@...>
Date: 2005-08-12T21:25:40+09:00
Subject: Re: Array redefinition problem

Robert Klemme wrote:

>Leslie Viljoen wrote:
>  
>
>>Hello!
>>
>>I have a large program which needs to be able to use Postgres OR
>>MySQL. Since the MySQL module's query result has a num_rows method
>>and Postgres returns an array, I thought I'd just redefine Array like
>>this:
>>
>>class Array
>> def num_rows
>>   return length
>> end
>>end
>>
>>But in another line (@entries = Array.new) I get:
>>
>>/var/www/ruby/core.rb:443:in `initialize': wrong number of arguments
>>(0 for 2) (ArgumentError)
>>
>>Now if I do the same thing in a small test program, I get no errors.
>>This works:
>>
>>class Array
>>  def num_rows
>>    return length
>>  end
>>end
>>
>>res = Array.new
>>puts res.num_rows
>>
>>In the large program I am not redefining Array anywhere else - what
>>else can
>>cause this error?
>>    
>>
>
>My guess is that it's unrelated to your change of the Array class.  Did
>you check line 443 of core.rb?
>
>    robert
>  
>

line 443:

@entries = Array.new


When I take Array redefinition change out, the whole program runs fine, except
that it cannot call Array.num_rows, which is what I want.


-- 
ruby -e "puts 'Just another fickle programmer'"

Leslie Viljoen    [leslie@camary.co.za]
Camary Consulting [http://www.camary.co.za]
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Personal web      [http://mobeus.homelinux.org]