jQuery XML calls make a default for 'undefined'

[HneO]

I'm using a jQuery ajax call to get several entries from a large set of data and write it out into a table. I want to change the settings of the ajax calls so that if no entry exists for a given ajax call jQuery should return 0 instead of undefined, is this possible?Edit:My call to the file is as follows\[code\]$.get('http://ontariosheep.org/mobile/data/data_osi2.php',function(data){ $('.content').empty(); $(data).find('market').each(function(){...}}\[/code\]