From: Robert Klemme <shortcutter@...>
Date: 2009-12-11T18:12:34+09:00
Subject: Re: human-readable listing of array elements

2009/12/11 botp <botpena@gmail.com>:
> On Thu, Dec 10, 2009 at 10:15 PM, Aldric Giacomoni <aldric@trevoke.net> wrote:
>> This took me less than a minute to write, but I don't know if it's as
>> elegant as it could be. Are there more "Ruby-like ways(tm)" to write
>> this?
>>
>> def stringify array
>>  return array[0] if array.size == 1
>>  string = ""
>>  array.each_with_index do |element, index|
>>    case index
>>      when array.size - 1 # last item
>>        string += " and #{element}"
>>      when 0
>>        string += "#{element}"
>>      else
>>        string += ", #{element}"
>>    end
>>  end
>>  string
>> end
>> --
>
>
> just joing the fun of ruby,
>
> C:\prg>cat test3.rb
>
> def stringify array
>  string = ""
>  array.each_with_index do |element, index|
>    string << case index
>                when 0
>                  ""
>                when (as=array.size) - 1 # last item
>                  (as < 3 ? "" : "," ) + " and "
>                else
>                  ", "
>              end << "#{element}"
>  end
>  string
> end
>
> s=[]
> %w(this is a test). each do |element|
>  p stringify(s<<[element])
> end
>
> C:\prg>ruby -W0 test3.rb
> "this"
> "this and is"
> "this, is, and a"
> "this, is, a, and test"

The comma... :-)

Cheers

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/