From: Belorion <belorion@...>
Date: 2005-07-26T00:22:26+09:00
Subject: Re: Newby question 'unless'

On 7/25/05, EdUarDo <eduardo.yanezNOSPAM@nospamgmail.com> wrote:
> Hi all, I'm overriding to_s method and I want to
> print an attribute if a condition is fulfilled.
> 
> def to_s
>    "#{@a}" + "#{@b}" unless @a == 0
> end
> 
> That sentence doesn't print anything when @a == 0 but what I want to do
> is to not print @b when @a == 0.
> 
> What's the correct syntax?
> 
> I know I could do:
> 
>      def to_s
>          s = "\n#{@post}"
>          if @post != :GK
>              s += "#{@side}"
>          end
>          s
>      end

You could try the ternary operator:

def to_s
    @a == 0 ? "#{@a}" : "#{@a} #{@b}"
end

Or,

def to_s
    s = @a
    s << " #{@b}" unless @a == 0
    return s
end
end