From: w_a_x_man <w_a_x_man@...>
Date: 2010-10-22T20:45:23+09:00
Subject: Re: more idiomatic way to avoid errors when calling method on variable that may be nil?

On Oct 11, 3:02 pm, Charles Calvert <cb...@yahoo.com> wrote:
> I'm using Ruby 1.8.7 patchlevel 249
>
> Is there a more idiomatic way to do the following?
>
> var = hash[key].nil? ? nil : hash[key].downcase
>
> Note that if hash[key] is nil, I want nil assigned to var, so this
> won't work:
>
> var = hash[key].downcase unless hash[key].nil?
>
> Obviously I could do this, but I'm trying to keep it on one line:
>
> var = hash[key]
> var = var.downcase unless var.nil?


s = hash[:foo] and s.downcase!