From: Lars Christensen <larsch@...>
Date: 2002-05-29T21:37:40+09:00
Subject: Re: Idioms

On Wed, May 29, 2002 at 08:58:59PM +0900, Stephan J. Schmidt wrote:

> Could someone point me to idioms about ruby, e.g. 
> something shorter to
> 
> if not hash.key?(key)
>   hash[key] << value
> end 

We have started a page here: http://www.rubygarden.org/ruby?RubyIdioms

The above could be turned into

   hash[key] ||= [value]

but if you always want to add the value, and make sure there is a list in the
hash you could do this:

   (hash[key] ||= []) << value

Some would argue this is not particular Ruby-ish, but I find such shortcuts
very convinient.

-- 
Lars Christensen