From: Brian Candler <B.Candler@...>
Date: 2007-05-04T02:40:20+09:00
Subject: Re: Beyond YAML? (scaling)

On Fri, May 04, 2007 at 01:25:05AM +0900, Bil Kleb wrote:
> Bil Kleb wrote:
> >
> > Hash.new{ |hash,key| hash[key]=[] }
> 
> Is there a better way than,
> 
>  samples[tag] = [] unless samples.has_key? tag
>  samples[tag] << sample

Not exactly identical but usually good enough:

samples[tag] ||= []
samples[tag] << sample

And you can probably combine:

(samples[tag] ||= []) << sample