From: "David J. Hamilton" <groups@...>
Date: 2011-03-04T02:16:38+09:00
Subject: Re: How to assign an element to a hash only if its value is not nil?

Excerpts from Thomas W.'s message of Thu Mar 03 09:10:26 -0800 2011:
> How to assign hash[:key] only if myvalue is not nil?
> 
> Current solution is:
> 
>     hash[:key] = myvalue unless myvalue.nil?
> 
> 
> Is there something more beautiful?

There is an alternate way.  Whether it is more beautiful or not is for you to
decide.

  myvalue and hash[:hey] = myvalue


  ruby-1.9.2-p136 :001 > h, m, n  = {}, 3, nil
   => [{}, 3, nil]
  ruby-1.9.2-p136 :003 > m and h[:m] = m
   => 3
  ruby-1.9.2-p136 :004 > n and h[:n] = n
   => nil
  ruby-1.9.2-p136 :005 > h
   => {:m=>3}

-- 
med v辰nlig h辰lsning
David J. Hamilton