From: dblack@...
Date: 2006-03-04T06:21:53+09:00
Subject: Re: Array comparison returning nil

Hi --

On Sat, 4 Mar 2006, Logan Capaldo wrote:

>
> On Mar 3, 2006, at 3:33 PM, dblack@wobblini.net wrote:
>
>> However:
>> 
>>>> [1,2,nil,3].join("-")
>> => "1-2--3"
>> 
>> so you'd get those extra -'s in one but not in the other if one but
>> not the other had nils.
>
> I doubt he's displaying the result of the join when doing the comparison, it 
> would still compare whether or not there are double dashes

It's not a display thing; it's a <=> or == thing.  If the two arrays
have unequal numbers of nils, and you join them with "-", the results
will not be equal.  Actually, I realize now that since he's sorting
them, he'll never get that far anyway, because this:

   [1,2,3,nil].sort

won't work at all; nor will ["1", "2", "3", nil].sort.

I'll keep my money on the theory that one array contains integers and
one contains string representations of the same integers :-)


David

-- 
David A. Black (dblack@wobblini.net)
Ruby Power and Light (http://www.rubypowerandlight.com)

"Ruby for Rails" chapters now available
from Manning Early Access Program! http://www.manning.com/books/black