SO - 17320159

HTML

<input type='text' class="class-name" data-a="11" data-b="14" data-c="17" />
<input type='text' class="class-name" data-a="12" data-b="15" data-c="18" />
<input type='text' class="class-name" data-a="13" data-b="16" data-c="19" />

JavaScript

// Create an empty Array
var data = [];
$('.class-name').each(function () {

    // Get the data attribute values
    var a = $(this).data('a');
    var b = $(this).data('b');
    var c = $(this).data('c');

    // Create an empty Object
    var obj = {};

    // Set the object key-value pairs
    obj['a'] = a;
    obj['b'] = b;
    obj['c'] = c;

    // Push the object to the 'data' array
    data.push(obj);
});

// Check the data array in the console
console.log(data);