Access dynamic(mysql) multiple field values of selected options using jquery or javascript -

<select id="sub-category" name="scat[]" multiple="multiple" placeholder="select subcategories"><option val=""></option>'; 

i have used select2 jquery plugin selecting mutiple categories. need access values of multi-selected options using jquery below. can me.

tag1= $("#sub-category[0]").val(); tag2= $("#sub-category[1]").val(); tag3= $("#sub-category[2]").val(); tag4= $("#sub-category[3]").val(); 

this log value of every selected option

$(function(){     $('#some_button').click(function(){         $('#sub-category :selected').each(function(){             console.log($(this).val());         });     }); });