/**
* An alternative to the formatted number sorting function above (particularly
* useful when considering localisation which uses dots / periods for 10^3
* separation rather than decimal places). Another method of overcoming it
* difficulties of sorting formatted numbers is to have the data to be sorted
* upon separate from the visual data. This sorting function pair will use the
* 'title' attribute of en empty span element (or anything else) to sort
* numerically (for example `<span title="1000000"><span>1'000'000`).
*
* Note that the HTML5 `data-sort` attribute can be [used to supply sorting data
* to DataTables](//datatables.net/manual/orthogonal-data) and is preferable to
* using this method, which is therefore marked as deprecated.
*
* @name Hidden title numeric sorting
* @summary Sort data numerically based on an attribute on an empty element.
* @deprecated
* @author [Allan Jardine](http://sprymedia.co.uk)
*
* @example
* $('#example').dataTable( {
* columnDefs: [
* { type: 'title-numeric', targets: 0 }
* ]
* } );
*/
jQuery.extend( jQuery.fn.dataTableExt.oSort, {
"title-numeric-pre": function ( a ) {
var x = a.match(/title="*(-?[0-9\.]+)/)[1];
return parseFloat( x );
},
"title-numeric-asc": function ( a, b ) {
return ((a < b) ? -1 : ((a > b) ? 1 : 0));
},
"title-numeric-desc": function ( a, b ) {
return ((a < b) ? 1 : ((a > b) ? -1 : 0));
}
} );
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