From: Tim Pease <tim.pease@...>
Date: 2007-06-21T04:40:34+09:00
Subject: Re: if == any item in an array

On 6/20/07, 12 34 <rubyforum@web.knobby.ws> wrote:
> I'd like to write something like
>
> PhotoEndings = %w[JPG,MRW,JPE]
> MovieEndings = %w[AVI]
> case ext # determined from the photo file name
> when PhotoEndings
> <do something whenever ext is the same as any of the photo endings. >
> when MovieEndings
> <do something else>
> else
> end
>
> I don't have to use case, any conditional will do.
>
> Thanks. I hope I have explained this. I have no idea what to search for.
> I did try some, but I'm a newbie and don't understand the more advanced
> syntax.
>

PhotoEndings = %w(JPG MRW JPE)
MovieEndings = %w(AVI)

case ext.upcase
when *PhotoEndings
  puts "I'm a photo!"
when *MovieEndings
  puts "I'm a movie!"
else
  puts "I'm unknown '#{ext}'"
end


When you were declaring your endings with the %w notation, you had put
commas between the file extensions. Therefore, your arrays only
contained one element.

Give this code a shot. You almost had it -- the syntax you were
looking for was the leading splat "*" in front of the PhotoEndings and
MovieEndings in the branches of the case statement.

Blessings,
TwP