From: Aldric Giacomoni <aldric@...>
Date: 2009-12-11T00:52:46+09:00
Subject: Re: human-readable listing of array elements

Marnen Laibow-Koser wrote:
> 
> Interesting question.
> 
> class Array # or perhaps module Enumerable
>   def stringify(conjunction = 'and', separator = ', ')
>     if self.size <= 1
>       return self.to_s
>     elsif self.size == 2
>       return self.join " #{conjunction} "
>     else
>       array = self.dup
>       array[-1] = [conjunction, array[-1]].join ' '
>       array.join separator # proper English usage has comma before 'and'
>     end
>   end
> end

It is pretty, and (like Robert's solution) handles the case where the 
array has no elements. I wouldn't put that into Enumerable though, not 
sure how it would handle a hash, for instance :)
Do you think if / elsif / else is better in this situation than "case 
self.size"? What about in general?
I know it's usually accepted that instead of several elsifs, one should 
use 'case', but I usually try to avoid 'elsif' altogether.
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