From: Cory Patterson <coryp@...>
Date: 2010-08-19T06:09:05+09:00
Subject: Check existence of object and it's property at the same time

I run into this from time to time and I was wondering if there is a
cleaner way to do check that an object is not nil and also check a
property of that object.

I want to do this:

if !@member.nil? and @member.is_active?
  ... do something ...
else
  ... do something else ...
end

But this obviously raises a no method error if @member is nil.

I end up having to do:

if !@member.nil?
  if @member.is_active?
    ... do something ...
  else
    ... do something else ...
  end
end

I know it isn't that much more verbose, but does ruby have a more
elegant way of handling this?
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