how to get all class element with same name in jquery code example

Example 1: how to get all elements with same class in jquery

$('.testimonial').each(function(i, obj) {
    //test
});

Example 2: jquery get all classes of a div

var classes = $('#test').attr('class').split(' ');

alert(classes[0]); // first class
alert(classes[1]); // second class
alert(classes[2]); // third class