Sort Options in a Select List with javascript/jQuery.. but not alphabetically

Question

I am looking for a function that will take a list of options in a select list and sort them alphabetically but with a twist. All values with the text \'NA\' should be pushed to

Answer 1

var sb = $('select');

sb.append(sb.find('option').sort(function(a, b){
    return (
        a = $(a).text(),
        b = $(b).text(),
        a == 'NA' ? 1 : b == 'NA' ? -1 : 0|a > b
    );
}));