From: "Shot (Piotr Szotkowski)" <shot@...>
Date: 2009-12-12T05:18:12+09:00
Subject: Re: human-readable listing of array elements

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Aldric Giacomoni:

> 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 =3D=3D 1
>   string =3D ""
>   array.each_with_index do |element, index|
>     case index
>       when array.size - 1 # last item
>         string +=3D " and #{element}"
>       when 0
>         string +=3D "#{element}"
>       else
>         string +=3D ", #{element}"
>     end
>   end
>   string
> end

Couldn=E2=80=99t resist:

def stringify a
  a.size < 2 ? a.first.to_s : a[0..-2].join(', ') + " and #{a.last}"
end

>> stringify []
=3D> ""
>> stringify ['Arthur']
=3D> "Arthur"
>> stringify ['Arthur', 'Ford']
=3D> "Arthur and Ford"
>> stringify ['Arthur', 'Ford', 'Trillian']
=3D> "Arthur, Ford and Trillian"
>> stringify ['Arthur', 'Ford', 'Trillian', 'Marvin']
=3D> "Arthur, Ford, Trillian and Marvin"

=E2=80=94 Shot
--=20
a :message to you, Ruby

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