From: "Mikael Høilund" <mikael@...>
Date: 2008-06-12T07:27:36+09:00
Subject: Re: Keyword parameters


On Jun 11, 2008, at 21:21, Glenn wrote:

> [T]o do something like iterate through the hash and turn all of the  
> symbol keys into local variable with their respective values?


No.
What you *can* do, however, is to simply refer to each of these  
options directly in the hash, making the hash values default instead.  
The naïve way:

options[:a] ||= 5
...

However, a more preferable way, however, is defining a hash with the  
default, and then letting the options hash override these:

options = {:a => 5, ...}.merge(options)

You can then access each option as option[:a] .... There are a few  
caveat with this, but these aren't usually a problem.

-- 
Mikael Høilund
http://hoilund.org/