From: Robert Klemme <shortcutter@...>
Date: 2009-08-14T00:00:13+09:00
Subject: Re: Simple If

2009/8/13 Robert Dober <robert.dober@gmail.com>:
> On Thu, Aug 13, 2009 at 10:18 AM, Anthony Eden<anthonyeden@gmail.com> wrote:
>> On Wed, Aug 12, 2009 at 10:14 PM, Pete Moran<pete@zoborg.com> wrote:
>>> UPDATE:
>>>
>>> This works
>>>
>>>    if params[:country][:id]
>>>      id = params[:country][:id]
>>>    else
>>>      id = params[:id]
>>>    end
>>>
>>> But is there a oneliner equivalent?
>>
>> id = params[:country][:id] || params[:id]
> maybe safer but still not safe
>
> id = params[:country] && params[:country][:id] || params[:id]

I'd go for

id = (params[:country] || params)[:id]

But, this does not seem to be what OP needs.  The Perl code was

my $id = (exists $hash->{id}) ? $hash->{id} : $_;

For me that translates to something like this:

def any_method(some_id_argument)
  id = @hash[:id] || some_id_argument
  ...
end

Kind regards

robert

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