From: Daniel Lucraft <dan@...>
Date: 2007-03-21T22:53:02+09:00
Subject: Re: nil? with block

Michiel De mare wrote:
> If "nil?" is extended to accept a block, and to return self (for
> Object) and the result of the yield (for NilClass), the following
> notation becomes possible:
> 
> user.personal_data.address.nil?{ raise 'no address!'}.zipcode
> 

Why not use Object#tap?

user.p_data.address.tap {|a| raise "no address!" unless a}.zipcode

It's included in Ruby 1.9, is easily definable otherwise
(http://rubyurl.com/eG5) and does basically what you want.

best,
Dan

-- 
Posted via http://www.ruby-forum.com/.