From: Logan Capaldo <logancapaldo@...>
Date: 2006-03-29T12:43:25+09:00
Subject: Re: Opposite of ||= pattern?

--Apple-Mail-9--59641472
Content-Transfer-Encoding: 7bit
Content-Type: text/plain;
	charset=US-ASCII;
	delsp=yes;
	format=flowed


On Mar 28, 2006, at 5:53 PM, ara.t.howard@noaa.gov wrote:

> harp:~ > ruby -e' 3.times{ p( @x ? nil : @x=42) } '
> 42
> nil
> nil

As an aside I was playing with ara's code (tried to put it in a  
method) and I got a toggle variable:
irb(main):006:0> def once
irb(main):007:1>   @x = @x ? nil : 1
irb(main):008:1> end
irb(main):009:0> once
=> 1
irb(main):010:0> once
=> nil
irb(main):011:0> once
=> 1
irb(main):012:0> once
=> nil
irb(main):013:0> once
=> 1



--Apple-Mail-9--59641472--