From: Mark Ransom <mark.ransom@...>
Date: 2007-08-29T23:18:25+09:00
Subject: Re: array.sort

Stefano Crocco wrote:
> Alle mercoled狸 29 agosto 2007, Mark Ransom ha scritto:
>> =>123
>>     ball = rand(56)
>>     redo if ball == 0 || nums.include?(ball)
>>     nums [values] = ball
>>   end
>> puts nums.sort
>> end
>>
>> Can anyone shed light on this newby?
>>
>> Attachments:
>> http://www.ruby-forum.com/attachment/183/array_sort.JPG
> 
> Your array ends up having 6 elements, the first of which is nil. This 
> happens
> because your values variable starts from 1, while arrays indexes start 
> at 0.
> sort doesn't work on arrays which contain nil elements, because nil 
> doesn't
> have the <=> operator, which is used by sort to compare elements. To 
> solve
> your problems, you should replace 1..5 with 0..4 (or use 5.times which, 
> in my
> opinion, is much clearer).
> 
> By the way, you can avoid to check whether ball is 0 by replacing
> 
>   ball = rand(56)
> 
> with
> 
>   ball = rand(55) + 1
> 
> I hope this helps
> 
> Stefano

Stefano,

Thanks for the quick reply and help, now that you've pointed it out it 
seems so obvious.  The one thing I could not find was a lot of 
information on the rand function so your help there is also greatly 
appreciated!

Mark
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