From: Martin Stannard <martins@...>
Date: 2004-05-08T21:42:08+09:00
Subject: Re: How to get the last 5 elements of an array?

On Sat, 2004-05-08 at 22:24, Xavier wrote:

> 
> But [1,2][-5,5] => nil
> and Gavin wants [1,2] instead of nil
> 
> How about
> 
> def last5(arr)
>  if arr.length<5 then arr else arr[-5,5] end
> end
> last5 []
> => []
> last5 [1]
> => [1]
> last5 [1,2]
> => [1, 2]
> last5 [1,2,3,4,5,6,7]
> => [3, 4, 5, 6, 7]
> last5 nil
> NoMethodError: undefined method `length' for nil:NilClass
>         from (irb):12:in `last5'
>         from (irb):18
> 
> 

Doh! That'll teach me to not read the post carefully.

cheers,

Martin