From: Frederick Cheung <frederick.cheung@...>
Date: 2008-07-16T01:52:27+09:00
Subject: Re: array ending syntax question


On 15 Jul 2008, at 15:07, Alex Gutteridge wrote:

> On 15 Jul 2008, at 06:13, Roger Pack wrote:
>
>> irb(main):001:0> [1,2][2..2]
>> => []
>> irb(main):002:0> [1,2][3..3]
>> => nil
>>
>>
>> Is this expected?
>> the ri says:
>>    Returns nil if the index (or starting index) are out of range.
>>
>> does the first example match this?
>> Thanks!
>> -R
>
> From the Pickaxe: If the start index equals the array size and a  
> length or range (as here) parameter is given, an empty array is  
> returned.
>
> Not sure why you would want that behaviour though...


It sort of makes sense in that in an n item array n is actually a  
useful index - it's where the next item will go.

Fred