From: Brian Candler <B.Candler@...>
Date: 2007-04-24T20:17:37+09:00
Subject: Re: Hash and Arrays...

On Tue, Apr 24, 2007 at 07:45:04PM +0900, Josselin wrote:
> I receive from yahoo weather an Hash like this one,
> 
> response
> => {"xmlns:geo"=>"http://www.w3.org/2003/01/geo/wgs84_pos#", 
> "xmlns:yweather"=>"http://xml.weather.yahoo.com/ns/rss/1.0", 
> "version"=>"2.0", "channel"=>[{"title"=>["Yahoo! Weather - Error"], 
> "description"=>["Yahoo! Weather Error"], "item"=>[{"title"=>["City not 
> found"], "description"=>["\n Sorry, your location 'dfghh' was not 
> found. Please try again.\n "]}]}]}
> 
> I need to test the response for an error on channel title,  I wrote :
> 
> (response.fetch("channel")[0]).fetch("title")[0]
> => "Yahoo! Weather - Error"
> 
> to get the string, but is there any simpler way to do it ?

response["channel"][0]["title"][0]

or:

response["channel"].first["title"].first

But it also depends on how you are parsing the XML. If you're using
xmlsimple then you can pass option 'ForceArray' => false, which gets rid of
the arrays. Then you can do

response["channel"]["title"]