CF: convert list to numeric list

gistfile1

/**
 * convert list to a list with numeric elements
 * 
 * @param  required string numList source list with elements]
 * @return list with numeric items
 */
string function toNumericList( required string numList ) {
    var numListLen = listLen( arguments.numList );
    var result     = "";
    if ( numListLen > 0 ) {
        for ( var i = 1; i <= numListLen; i = i + 1 ) {
            if ( isNumeric( listGetAt( arguments.numList, i ) ) ) {
              result = listAppend( result, listGetAt( arguments.numList, i ), "," );
            }
        }
    }
    return result;
}